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Yang R, Corasaniti M, Le CC, Liao ZY, Wang AF, Du Q, Petrovic C, Qiu XG, Hu JP, Degiorgi L. Spin-Canting-Induced Band Reconstruction in the Dirac Material Ca_{1-x}Na_{x}MnBi_{2}. Phys Rev Lett 2020; 124:137201. [PMID: 32302196 DOI: 10.1103/physrevlett.124.137201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/12/2020] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
The ternary AMnBi_{2} (A is alkaline as well as rare-earth atom) materials provide an arena for investigating the interplay between low-dimensional magnetism of the antiferromagnetic MnBi layers and the electronic states in the intercalated Bi layers, which harbor relativistic fermions. Here, we report on a comprehensive study of the optical properties and magnetic torque response of Ca_{1-x}Na_{x}MnBi_{2}. Our findings give evidence for a spin canting occurring at T_{s}∼50-100 K. With the support of first-principles calculations we establish a direct link between the spin canting and the reconstruction of the electronic band structure, having immediate implications for the spectral weight reshuffling in the optical response, signaling a partial gapping of the Fermi surface, and the dc transport properties below T_{s}.
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Affiliation(s)
- R Yang
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - M Corasaniti
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - C C Le
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Z Y Liao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - A F Wang
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Q Du
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, USA
| | - C Petrovic
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, USA
| | - X G Qiu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - J P Hu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- South Bay Interdisciplinary Science Center, Dongguan, Guangdong Province 523808, China
| | - L Degiorgi
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
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2
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Mirri C, Dusza A, Bastelberger S, Chinotti M, Degiorgi L, Chu JH, Kuo HH, Fisher IR. Origin of the Resistive Anisotropy in the Electronic Nematic Phase of BaFe(2)As(2) Revealed by Optical Spectroscopy. Phys Rev Lett 2015; 115:107001. [PMID: 26382696 DOI: 10.1103/physrevlett.115.107001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Indexed: 06/05/2023]
Abstract
We perform, as a function of uniaxial stress, an optical-reflectivity investigation of the representative "parent" ferropnictide BaFe(2)As(2) in a broad spectral range, across the tetragonal-to-orthorhombic phase transition and the onset of the long-range antiferromagnetic (AFM) order. The infrared response reveals that the dc transport anisotropy in the orthorhombic AFM state is determined by the interplay between the Drude spectral weight and the scattering rate, but that the dominant effect is clearly associated with the metallic spectral weight. In the paramagnetic tetragonal phase, though, the dc resistivity anisotropy of strained samples is almost exclusively due to stress-induced changes in the Drude weight rather than in the scattering rate, definitively establishing the anisotropy of the Fermi surface parameters as the primary effect driving the dc transport properties in the electronic nematic state.
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Affiliation(s)
- C Mirri
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - A Dusza
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - S Bastelberger
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - M Chinotti
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - L Degiorgi
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - J-H Chu
- Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, California 94305, USA and Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - H-H Kuo
- Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, California 94305, USA and Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - I R Fisher
- Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, California 94305, USA and Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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Ott H, Chernikov M, Felder E, Degiorgi L, Moshopoulou E, Sarrao J, Fisk Z. Structure and low temperature properties of SrB6. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s002570050297] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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4
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Pfuner F, Gvasaliya SN, Zaharko O, Keller L, Mesot J, Pomjakushin V, Chu JH, Fisher IR, Degiorgi L. Incommensurate magnetic order in TbTe3. J Phys Condens Matter 2012; 24:036001. [PMID: 22156023 DOI: 10.1088/0953-8984/24/3/036001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report a neutron diffraction study of the magnetic phase transitions in the charge-density wave (CDW) TbTe(3) compound. We discover that in the paramagnetic phase there are strong 2D-like magnetic correlations, consistent with the pronounced anisotropy of the chemical structure. A long-range incommensurate magnetic order emerges in TbTe(3) at T(mag1) = 5.78 K as a result of continuous phase transitions. We observe that near the temperature T(mag1) the magnetic Bragg peaks appear around the position (0, 0, 0.24) (or its rational multiples), that is fairly close to the propagation vector (0,0,0.29) associated with the CDW phase transition in TbTe(3). This suggests that correlations leading to the long-range magnetic order in TbTe(3) are linked to the modulations that occur in the CDW state.
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Affiliation(s)
- F Pfuner
- Laboratory for Solid State Physics, ETH Zürich, Zürich, Switzerland
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5
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Pfuner F, Degiorgi L, Berger H, Forró L. Infrared investigation of the phonon spectrum in the frustrated spin cluster compound FeTe(2)O(5)Cl. J Phys Condens Matter 2009; 21:375401. [PMID: 21832346 DOI: 10.1088/0953-8984/21/37/375401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present our optical investigations on the frustrated spin cluster compound FeTe(2)O(5)Cl, which develops a long-range antiferromagnetic order below 10 K. We measure the optical reflectivity from the far-infrared to the ultraviolet with polarized light. We focus our attention on the lattice dynamics by discussing the infrared-active modes. Our findings reveal a polarization dependence of the vibrational modes but which do not seem to be affected by structural anomalies linked to the magnetically ordered state at low temperatures.
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Affiliation(s)
- F Pfuner
- Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland
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6
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Sacchetti A, Arcangeletti E, Perucchi A, Baldassarre L, Postorino P, Lupi S, Ru N, Fisher IR, Degiorgi L. Pressure dependence of the charge-density-wave gap in rare-earth tritellurides. Phys Rev Lett 2007; 98:026401. [PMID: 17358625 DOI: 10.1103/physrevlett.98.026401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Indexed: 05/14/2023]
Abstract
We investigate the pressure dependence of the optical properties of CeTe3, which exhibits an incommensurate charge-density-wave (CDW) state already at 300 K. Our data are collected in the midinfrared spectral range at room temperature and at pressures between 0 and 9 GPa. The energy for the single particle excitation across the CDW gap decreases upon increasing the applied pressure, similarly to the chemical pressure by rare-earth substitution. The broadening of the bands upon lattice compression removes the perfect nesting condition of the Fermi surface and therefore diminishes the impact of the CDW transition on the electronic properties of RTe3.
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Affiliation(s)
- A Sacchetti
- Laboratorium für Festkörperphysik, ETH-Zürich, CH-8093 Zürich, Switzerland
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7
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Caimi G, Degiorgi L, Berger H, Forró L. Phonon analysis of the S = 1 quantum spin systems Ni(5)Te(4)O(12)X(2) (X = Cl and Br). J Phys Condens Matter 2006; 18:4065-4070. [PMID: 21690757 DOI: 10.1088/0953-8984/18/16/012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report our investigations of the electrodynamic response of the S = 1 quantum spin systems Ni(5)Te(4)O(12)X(2) (X = Cl and Br), which develop a magnetic ordered state below 30 K. We measure the optical reflectivity over a broad spectral range extending from the far infrared up to the ultraviolet. Besides identifying the electronic interband transitions, we primarily focus our attention on the lattice dynamics, emphasizing the phonon modes spectrum and its temperature dependence. Our findings do not reveal any direct link between possible structural anomalies and the transition into the magnetically ordered state at low temperatures.
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Affiliation(s)
- G Caimi
- Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland
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8
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Caimi G, Perucchi A, Degiorgi L, Ott HR, Pereira VM, Neto AHC, Bianchi AD, Fisk Z. Magneto-optical evidence of double exchange in a percolating lattice. Phys Rev Lett 2006; 96:016403. [PMID: 16486488 DOI: 10.1103/physrevlett.96.016403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Indexed: 05/06/2023]
Abstract
Substituting Eu by Ca in ferromagnetic EuB6 leads to a percolation limited magnetic ordering. We present and discuss magneto-optical data of the Eu(1-x)Ca(x)B6 series, based on measurements of the reflectivity R(omega) from the far infrared up to the ultraviolet, as a function of temperature and magnetic field. Via the Kramers-Kronig transformation of R(omega) we extract the complete absorption spectra of samples with different values of x. The change of the spectral weight in the Drude component by increasing the magnetic field agrees with a scenario based on the double-exchange model, and suggests a crossover from a ferromagnetic metal to a ferromagnetic Anderson insulator upon increasing Ca content at low temperatures.
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Affiliation(s)
- G Caimi
- Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland
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9
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Süllow S, Maksimov I, Otop A, Litterst FJ, Perucchi A, Degiorgi L, Mydosh JA. Metallic ground state and glassy transport in single crystalline URh2Ge2: enhancement of disorder effects in a strongly correlated electron system. Phys Rev Lett 2004; 93:266602. [PMID: 15698001 DOI: 10.1103/physrevlett.93.266602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2004] [Indexed: 05/24/2023]
Abstract
We present a detailed study of the electronic transport properties on a single crystalline specimen of the moderately disordered heavy-fermion system URh2Ge2. For this material, we find glassy electronic transport in a single crystalline compound. We derive the temperature dependence of the electrical conductivity and establish metallicity by means of optical conductivity and Hall effect measurements. The overall behavior of the electronic transport properties closely resembles that of metallic glasses, with at low temperatures an additional minor spin disorder contribution. We argue that this glassy electronic behavior in a crystalline compound reflects the enhancement of disorder effects as a consequence of strong electronic correlations.
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Affiliation(s)
- S Süllow
- Institut für Metallphysik und Nukleare Festkörperphysik, TU Braunschweig, 38106 Braunschweig, Germany
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10
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Perucchi A, Caimi G, Ott HR, Degiorgi L, Bianchi AD, Fisk Z. Optical evidence for a spin-filter effect in the charge transport of Eu0.6Ca0.4B6. Phys Rev Lett 2004; 92:067401. [PMID: 14995273 DOI: 10.1103/physrevlett.92.067401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2003] [Indexed: 05/24/2023]
Abstract
We have measured the optical reflectivity R(omega) of Eu0.6Ca0.4B6 as a function of temperature (T) between 1.5 and 300 K and in external magnetic fields (H) up to 7 T. R(omega) increases with decreasing T and increasing H field, but the plasma edge feature does not exhibit the sharp onset and steep slope that is observed in EuB6. The analysis of the H-field dependence of the low-T optical conductivity confirms the previously observed exponential decrease of the electrical resistivity upon increasing bulk magnetization at constant T. The individual exponential magnetization dependences of the plasma frequency and scattering rate are also extracted from the optical data.
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Affiliation(s)
- A Perucchi
- Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland
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11
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Perucchi A, Degiorgi L, Jun J, Angst M, Karpinski J. Magneto-optical study of the superconducting gap of MgB(2) single crystals. Phys Rev Lett 2002; 89:097001. [PMID: 12190429 DOI: 10.1103/physrevlett.89.097001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2002] [Indexed: 05/23/2023]
Abstract
We present magneto-optical reflectivity results in the basal plane of the hexagonal MgB(2). The data were collected on a mosaic of MgB(2) single crystals with T(c)=38 K from the ultraviolet down to the far infrared as a function of temperature and magnetic field oriented along the c axis. In the far infrared, there is a clear signature of the superconducting gap with a gap ratio 2 Delta/k(B)T(c) approximately 1.2, well below the weak-coupling value. The gap is suppressed in an external magnetic field, which is a function of temperature. We extract the upper critical field H(c2) along the c axis. The temperature dependence of H(c2) is compatible with the Helfand-Werthamer behavior.
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Affiliation(s)
- A Perucchi
- Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland
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12
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Perfetti L, Berger H, Reginelli A, Degiorgi L, Höchst H, Voit J, Margaritondo G, Grioni M. Spectroscopic indications of polaronic carriers in the quasi-one-dimensional conductor (TaSe4)2I. Phys Rev Lett 2001; 87:216404. [PMID: 11736358 DOI: 10.1103/physrevlett.87.216404] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2001] [Indexed: 05/23/2023]
Abstract
Angle-resolved photoemission (ARPES) on the quasi-one-dimensional conductor (TaSe4)2I shows a hidden Fermi-surface crossing in its metallic state and the opening of a Peierls gap at low temperatures. The underlying quasiparticles have vanishing spectral weight and extremely short coherence lengths. They are interpreted as polarons in the strong-coupling adiabatic limit, and almost all their ARPES weight is incoherent. These observations suggest a scenario where the long-standing contradictions between ARPES and other experiments on Peierls materials could be resolved.
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Affiliation(s)
- L Perfetti
- Institut de Physique Appliquée, Ecole Polytechnique Fédérale (EPFL), CH-1015 Lausanne, Switzerland
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13
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Ruzicka B, Degiorgi L, Berger H, Gaál R, Forró L. Charge dynamics of 2H- TaSe2 along the less-conducting c-axis. Phys Rev Lett 2001; 86:4136-4139. [PMID: 11328114 DOI: 10.1103/physrevlett.86.4136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2000] [Indexed: 05/23/2023]
Abstract
We present an optical study of 2H-TaSe2 along the less conducting c-axis. This dichalcogenide compound belongs to a large class of conductors called "bad metals" (with a mean free path smaller than the lattice constant along the c-axis), which also includes the superconducting cuprates. The optical response shows the progressive development of a pseudogaplike feature with decreasing temperature. The spectral weight lost by the opening of such a pseudogap goes into the narrow Drude component, developing at low frequency and temperature. There is no violation of the sum rule in 2H-TaSe2 contrary to the cuprates.
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Affiliation(s)
- B Ruzicka
- Laboratorium für Festkörperphysik ETH Zurich, CH-8093 Zurich, Switzerland
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14
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Pashkevich YG, Blinkin VA, Gnezdilov VP, Tsapenko VV, Eremenko VV, Lemmens P, Fischer M, Grove M, Guntherodt G, Degiorgi L, Wachter P, Tranquada JM, Buttrey DJ. Stripe conductivity in La1.775Sr0.225NiO4. Phys Rev Lett 2000; 84:3919-3922. [PMID: 11019239 DOI: 10.1103/physrevlett.84.3919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/1999] [Indexed: 05/23/2023]
Abstract
We report Raman light-scattering and optical conductivity measurements on a single crystal of La1.775Sr0.225NiO4 which exhibits incommensurate charge-stripe order. The extra phonon peaks induced by stripe order can be understood in terms of the energies of phonons that occur at the charge-order wave vector Q(c). A strong Fano antiresonance for a Ni-O bond-stretching mode provides clear evidence for finite dynamical conductivity within the charge stripes.
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Affiliation(s)
- YG Pashkevich
- A. A. Galkin Donetsk Phystech NASU, 83114 Donetsk, Ukraine
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Vescoli V, Zwick F, Voit J, Berger H, Zacchigna M, Degiorgi L, Grioni M, Gruner G. Dynamical properties of the one-dimensional band insulator (NbSe4)3I. Phys Rev Lett 2000; 84:1272-1275. [PMID: 11017496 DOI: 10.1103/physrevlett.84.1272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/1999] [Indexed: 05/23/2023]
Abstract
Optical and photoemission experiments reveal unexpected spectral signatures of one-dimensional band insulators. In the model compound (NbSe (4))3I the optical conductivity decays as a power law sigma(1)(omega) approximately omega(-4.25) above a sharp gap edge. Photoemission observes both the valence and a shadow band, produced by a commensurate superstructure. We identify an optical and photoemission band gap consistent with other measurements but much smaller than the energy scale defined by the dispersion of the band peak in the photoemission spectra.
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Affiliation(s)
- V Vescoli
- Laboratorium fur Festkorperphysik, ETH Zurich, CH-8093 Zurich, Switzerland
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Vescoli V, Degiorgi L, Henderson W, Gruner G, Starkey KP, Montgomery LK. Dimensionality-driven insulator-to-metal transition in the bechgaard salts. Science 1998; 281:1181-4. [PMID: 9712580 DOI: 10.1126/science.281.5380.1181] [Citation(s) in RCA: 200] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Optical experiments were conducted on a series of organic linear chain conductors with different values of the interchain single-electron transfer integral tb, which quantifies the degree of anisotropy. Electron-electron interactions together with Umklapp scattering resulted in a correlation gap and an insulating state for small tb. An insulator-to-metal transition was observed when tb exceeded a critical value, on the order of the correlation gap Egap. The absence of a plasma edge on the insulator side of the transition for polarization perpendicular to the chains suggests that the electrons are confined to the chains. The optical features of the metallic state, when contrasted with the magnetic properties, are suggestive of spin-charge separation.
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Affiliation(s)
- V Vescoli
- V. Vescoli and L. Degiorgi, Laboratorium fur Festkorperphysik, Eidgenossische Technische Hochschule, CH-8093 Zurich, Switzerland. W. Henderson and G. Gruner, Department of Physics, University of California, Los Angeles, CA 90095-1547, USA. K
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17
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Degiorgi L, Wachter P, Maple MB, Herrmann J. Optical evidence of non-Fermi-liquid behavior in U1-xThxPd2Al3. Phys Rev B Condens Matter 1996; 54:6065-6068. [PMID: 9986608 DOI: 10.1103/physrevb.54.6065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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18
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Dressel M, Schwartz A, Grüner G, Degiorgi L. Deviations from Drude Response in Low-Dimensional Metals: Electrodynamics of the Metallic State of (TMTSF)2PF6. Phys Rev Lett 1996; 77:398-401. [PMID: 10062441 DOI: 10.1103/physrevlett.77.398] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Degiorgi L, Dressel M, Schwartz A, Alavi B, Grüner G. Direct observation of the spin-density-wave gap in (TMTSF)2PF 6. Phys Rev Lett 1996; 76:3838-3841. [PMID: 10061122 DOI: 10.1103/physrevlett.76.3838] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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20
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Schwartz A, Dressel M, Alavi B, Blank A, Dubois S, Grüner G, Gorshunov BP, Volkov AA, Kozlov GV, Thieme S, Degiorgi L, Lévy F. Fluctuation effects on the electrodynamics of quasi-one-dimensional conductors above the charge-density-wave transition. Phys Rev B Condens Matter 1995; 52:5643-5652. [PMID: 9981748 DOI: 10.1103/physrevb.52.5643] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Degiorgi L, Thieme S, Alavi B, Grüner G, McKenzie RH, Kim K, Levy F. Fluctuation effects in quasi-one-dimensional conductors: Optical probing of thermal lattice fluctuations. Phys Rev B Condens Matter 1995; 52:5603-5610. [PMID: 9981743 DOI: 10.1103/physrevb.52.5603] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Degiorgi L, Ott HR, Hulliger F. Frequency and temperature dependence of the transport relaxation rate of the Kondo alloy U0.2Y0.8Pd3: Evidence for non-Fermi-liquid behavior. Phys Rev B Condens Matter 1995; 52:42-45. [PMID: 9979564 DOI: 10.1103/physrevb.52.42] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Bommeli F, Degiorgi L, Wachter P, Legeza Ö, Jánossy A, Oszlanyi G, Chauvet O, Forro L. Metallic conductivity and metal-insulator transition in (AC60)n (A=K, Rb, and Cs) linear polymer fullerides. Phys Rev B Condens Matter 1995; 51:14794-14797. [PMID: 9978430 DOI: 10.1103/physrevb.51.14794] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bommeli F, Degiorgi L, Wachter P, Mihailovic D, Hassanien A, Venturini P, Schreiber M, Diederich F. Complete optical response of the magnetic fullerene derivative tetrakis(dimethylamino)ethylene-C60. Phys Rev B Condens Matter 1995; 51:1366-1369. [PMID: 9978307 DOI: 10.1103/physrevb.51.1366] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gorshunov BP, Volkov AA, Kozlov GV, Degiorgi L, Blank A, Csiba T, Dressel M, Kim Y, Schwartz A, Grüner G. Charge-density-wave paraconductivity in K0.3MoO3. Phys Rev Lett 1994; 73:308-311. [PMID: 10057137 DOI: 10.1103/physrevlett.73.308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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26
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Degiorgi L, Briceno G, Fuhrer MS, Zettl A, Wachter P. Optical measurements of the superconducting gap in single-crystal K3C60 and Rb3C60. Nature 1994. [DOI: 10.1038/369541a0] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Degiorgi L, Grüner G, Kim K, McKenzie RH, Wachter P. Optical probing of thermal lattice fluctuations in charge-density-wave condensates. Phys Rev B Condens Matter 1994; 49:14754-14757. [PMID: 10010571 DOI: 10.1103/physrevb.49.14754] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Degiorgi L, Nicol EJ, Klein O, Grüner G, Wachter P, Huang S, Wiley J, Kaner RB. Optical properties of the alkali-metal-doped superconducting fullerenes: K3C60 and Rb3C60. Phys Rev B Condens Matter 1994; 49:7012-7025. [PMID: 10009429 DOI: 10.1103/physrevb.49.7012] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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29
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Donovan S, Kim Y, Degiorgi L, Dressel M, Grüner G, Wonneberger W. Electrodynamics of the spin-density-wave ground state: Optical experiments on (TMTSF)2PF6. Phys Rev B Condens Matter 1994; 49:3363-3377. [PMID: 10011198 DOI: 10.1103/physrevb.49.3363] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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30
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Awasthi AM, Degiorgi L, Grüner G, Dalichaouch Y, Maple MB. Complete optical spectrum of CeAl3. Phys Rev B Condens Matter 1993; 48:10692-10700. [PMID: 10007366 DOI: 10.1103/physrevb.48.10692] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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31
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Degiorgi L, Teraoka S, Compagnini G, Wachter P. Optical and Raman investigation of Yb pnictide compounds. Phys Rev B Condens Matter 1993; 47:5715-5720. [PMID: 10004518 DOI: 10.1103/physrevb.47.5715] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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32
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Degiorgi L, Wachter P, Grüner G, Huang S, Wiley J, Kaner RB. Optical response of the superconducting state of K3C60 and Rb3C60. Phys Rev Lett 1992; 69:2987-2990. [PMID: 10046692 DOI: 10.1103/physrevlett.69.2987] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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33
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Degiorgi L, Grüner G, Wachter P, Huang S, Wiley J, Whetten RL, Kaner RB, Holczer K, Diederich F. Electrodynamic response of Rb3C60. Phys Rev B Condens Matter 1992; 46:11250-11253. [PMID: 10003012 DOI: 10.1103/physrevb.46.11250] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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34
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Degiorgi L, Alavi B, Mihály G, Grüner G. Complete excitation spectrum of charge-density waves: Optical experiments on K0.3MoO3. Phys Rev B Condens Matter 1991; 44:7808-7819. [PMID: 9998710 DOI: 10.1103/physrevb.44.7808] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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35
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Degiorgi L, Grüner G. Pinned and bound collective-mode state in charge-density-wave condensates. Phys Rev B Condens Matter 1991; 44:7820-7827. [PMID: 9998711 DOI: 10.1103/physrevb.44.7820] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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36
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Degiorgi L, Wachter P, Haruki M, Kurita S. Phonons in one-dimensional Peierls-Hubbard systems. Phys Rev B Condens Matter 1990; 42:4341-4350. [PMID: 9995962 DOI: 10.1103/physrevb.42.4341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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37
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38
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Monnier R, Degiorgi L, Delley B. Specific heat of the ytterbium monopnictides above 5 K from a band-structure calculation. Phys Rev B Condens Matter 1990; 41:573-581. [PMID: 9992796 DOI: 10.1103/physrevb.41.573] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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39
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Degiorgi L, Wachter P, Haruki M, Kurita S. Far-infrared optical investigations on quasi-one-dimensional halogen-bridged mixed-valence compounds. Phys Rev B Condens Matter 1989; 40:3285-3293. [PMID: 9992266 DOI: 10.1103/physrevb.40.3285] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Degiorgi L, Wachter P, Greenblatt M, McCarroll WH, Ramanujachary KV, Marcus J, Schlenker C. Optical investigation of quasi-one- and two-dimensional systems A0.9Mo. Phys Rev B Condens Matter 1988; 38:5821-5826. [PMID: 9947041 DOI: 10.1103/physrevb.38.5821] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Degiorgi L, Blatter-Mörke I, Wachter P. Magnetite: Phonon modes and the Verwey transition. Phys Rev B Condens Matter 1987; 35:5421-5424. [PMID: 9940749 DOI: 10.1103/physrevb.35.5421] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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43
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Monnier R, Degiorgi L, Koelling DD. Towards a self-consistent determination of the mixing parameters in the Anderson model: An application to the 4f-excitation spectra of YbP. Phys Rev Lett 1986; 56:2744-2747. [PMID: 10033079 DOI: 10.1103/physrevlett.56.2744] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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