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Wårdh J, Granath M, Wu J, Bollinger AT, He X, Božović I. Colossal transverse magnetoresistance due to nematic superconducting phase fluctuations in a copper oxide. PNAS NEXUS 2023; 2:pgad255. [PMID: 37601309 PMCID: PMC10438889 DOI: 10.1093/pnasnexus/pgad255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 07/25/2023] [Indexed: 08/22/2023]
Abstract
Electronic anisotropy ("nematicity") has been detected in cuprate superconductors by various experimental techniques. Using angle-resolved transverse resistance (ARTR) measurements, a very sensitive and background-free technique that can detect 0.5% anisotropy in transport, we have observed it also in La2-xSrxCuO4 (LSCO) for 0.02 ≤ x ≤ 0.25. A central enigma in LSCO is the rotation of the nematic director (orientation of the largest longitudinal resistance) with temperature; this has not been seen before in any material. Here, we address this puzzle by measuring the angle-resolved transverse magnetoresistance (ARTMR) in LSCO. We report the discovery of colossal transverse magnetoresistance (CTMR)-an order-of-magnitude drop in the transverse resistivity in the magnetic field of 6 T. We show that the apparent rotation of the nematic director is caused by anisotropic superconducting fluctuations, which are not aligned with the normal electron fluid, consistent with coexisting bond-aligned and diagonal nematic orders. We quantify this by modeling the (magneto-)conductivity as a sum of normal (Drude) and paraconducting (Aslamazov-Larkin) channels but extended to contain anisotropic Drude and Cooper-pair effective mass tensors. Strikingly, the anisotropy of Cooper-pair stiffness is much larger than that of the normal electrons. It grows dramatically on the underdoped side, where the fluctuations become quasi-one-dimensional. Our analysis is general rather than model dependent. Still, we discuss some candidate microscopic models, including coupled strongly-correlated ladders where the transverse (interladder) phase stiffness is low compared with the longitudinal intraladder stiffness, as well as the anisotropic superconducting fluctuations expected close to the transition to a pair-density wave state.
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Affiliation(s)
- Jonatan Wårdh
- Department of Physics, University of Gothenburg, SE-41296 Gothenburg, Sweden
| | - Mats Granath
- Department of Physics, University of Gothenburg, SE-41296 Gothenburg, Sweden
| | - Jie Wu
- Brookhaven National Laboratory, Upton, NY 11973, USA
- Present address: School of Science, Westlake University, Hangzhou, China
| | | | - Xi He
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Ivan Božović
- Brookhaven National Laboratory, Upton, NY 11973, USA
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
- Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
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2
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Chainani A, Sicot M, Fagot-Revurat Y, Vasseur G, Granet J, Kierren B, Moreau L, Oura M, Yamamoto A, Tokura Y, Malterre D. Evidence for Weakly Correlated Oxygen Holes in the Highest-T_{c} Cuprate Superconductor HgBa_{2}Ca_{2}Cu_{3}O_{8+δ}. PHYSICAL REVIEW LETTERS 2017; 119:057001. [PMID: 28949729 DOI: 10.1103/physrevlett.119.057001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 06/07/2023]
Abstract
We study the electronic structure of HgBa_{2}Ca_{2}Cu_{3}O_{8+δ} (Hg1223; T_{c}=134 K) using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). Resonant valence band PES across the O K edge and Cu L edge identifies correlation satellites originating in O 2p and Cu 3d two-hole final states, respectively. Analyses using the experimental O 2p and Cu 3d partial density of states show quantitatively different on-site Coulomb energy for the Cu site (U_{dd}=6.5±0.5 eV) and O site (U_{pp}=1.0±0.5 eV). Cu_{2}O_{7}-cluster calculations with nonlocal screening explain the Cu 2p core level PES and Cu L-edge XAS spectra, confirm the U_{dd} and U_{pp} values, and provide evidence for the Zhang-Rice singlet state in Hg1223. In contrast to other hole-doped cuprates and 3d-transition metal oxides, the present results indicate weakly correlated oxygen holes in Hg1223.
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Affiliation(s)
- A Chainani
- RIKEN SPring-8 Centre, 1-1-1 Sayo-cho, Hyogo 679-5148, Japan
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - M Sicot
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - Y Fagot-Revurat
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - G Vasseur
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - J Granet
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - B Kierren
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - L Moreau
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
| | - M Oura
- RIKEN SPring-8 Centre, 1-1-1 Sayo-cho, Hyogo 679-5148, Japan
| | - A Yamamoto
- Strong Correlation Physics Division, RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - Y Tokura
- Strong Correlation Physics Division, RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - D Malterre
- Institut Jean Lamour, Université de Lorraine, UMR 7198 CNRS, BP70239, 54506 Vandoeuvre lés Nancy, France
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3
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Kim HS, Kim S, Kim K, Min BI, Cho YH, Wang L, Cheong SW, Yeom HW. Nanoscale Superconducting Honeycomb Charge Order in IrTe2. NANO LETTERS 2016; 16:4260-4265. [PMID: 27221583 DOI: 10.1021/acs.nanolett.6b01293] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Entanglement of charge orderings and other electronic orders such as superconductivity is in the core of challenging physics issues of complex materials including high temperature superconductivity. Here, we report on the observation of a unique nanometer scale honeycomb charge ordering of the cleaved IrTe2 surface, which hosts a superconducting state. IrTe2 was recently established to exhibit an intriguing cascade of stripe charge orders. The stripe phases coexist with a hexagonal phase, which is formed locally and falls into a superconducting state below 3 K. The atomic and electronic structures of the honeycomb and hexagon pattern of this phase are consistent with the charge order nature, but the superconductivity does not survive on neighboring stripe charge order domains. The present work provides an intriguing physics issue and a new direction of functionalization for two-dimensional materials.
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Affiliation(s)
- Hyo Sung Kim
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS) , Pohang 790-784, Korea
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Sooran Kim
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Kyoo Kim
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Byung Il Min
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Yong-Heum Cho
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
- Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Lihai Wang
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
- Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology , Pohang 790-784, Korea
| | - Sang-Wook Cheong
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
- Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology , Pohang 790-784, Korea
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Piscataway, New Jersey 08854, United States
| | - Han Woong Yeom
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS) , Pohang 790-784, Korea
- Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea
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4
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Lü MF, Waerenborgh JC, Greaves C. Sr 4Fe 6O 12: Low-Temperature Fe 2+-Fe 3+Charge Order within Pairs of Edge-Linked Tetrahedra. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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5
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Lü MF, Waerenborgh JC, Greaves C. Sr4Fe6O12: Low-Temperature Fe2+-Fe3+Charge Order within Pairs of Edge-Linked Tetrahedra. Angew Chem Int Ed Engl 2013; 52:4833-6. [DOI: 10.1002/anie.201209473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 02/12/2013] [Indexed: 11/09/2022]
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6
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Atkinson WA, Bazak JD, Andersen BM. Robust nodal d-wave spectrum in simulations of a strongly fluctuating competing order in underdoped cuprate superconductors. PHYSICAL REVIEW LETTERS 2012; 109:267004. [PMID: 23368606 DOI: 10.1103/physrevlett.109.267004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Indexed: 06/01/2023]
Abstract
We resolve an existing discrepancy between convincing evidence for competing order in underdoped cuprates and spectroscopic data consistent with a homogeneous d-wave superconductor in the very same compounds. Specifically, we show that fluctuations of the competing order generate strongly inhomogeneous states whose spectra are almost indistinguishable from the pure d-wave superconductor. This is in contrast to the commonly studied case of homogeneously coexisting order, which typically generates a reconstructed Fermi surface with closed Fermi pockets. The signatures of the fluctuating competing order can be found mainly in a splitting of the antinodal band, and, for strong magnetic order, in small induced nodal gaps similar to those found in recent experiments on underdoped La(2-x)Sr(x)CuO4.
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Affiliation(s)
- W A Atkinson
- Department of Physics and Astronomy, Trent University, Peterborough, Ontario, Canada K9J 7B8.
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7
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Liu XJ, Zhang S, Chai P, Meng J. Charge ordering induced metal–semiconductor transition in Ag2BiO3: A first-principles study. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.06.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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McQueeney RJ, Ma J, Chang S, Yan JQ, Hehlen M, Trouw F. Stabilization of charge ordering in La1/3Sr2/3FeO3-delta by magnetic exchange. PHYSICAL REVIEW LETTERS 2007; 98:126402. [PMID: 17501139 DOI: 10.1103/physrevlett.98.126402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2006] [Indexed: 05/15/2023]
Abstract
The magnetic exchange energies in charge ordered La1/3Sr2/3FeO3-delta (LSFO) and its parent compound LaFeO3 (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+-Fe5+ pairs (JF) and antiferromagnetic exchange between Fe3+-Fe3+ pairs (JAF) fulfills the criterion for charge ordering driven by magnetic interactions (|JF/JAF|>1). The 30% reduction of JAF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.
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Affiliation(s)
- R J McQueeney
- Dept. of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA and Ames Laboratory, Ames, Iowa 50011, USA
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9
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Andersen BM, Hedegård P. Spin dynamics in the stripe phase of the cuprate superconductors. PHYSICAL REVIEW LETTERS 2005; 95:037002. [PMID: 16090765 DOI: 10.1103/physrevlett.95.037002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2004] [Indexed: 05/03/2023]
Abstract
Within a model that supports stripe spin and charge order coexisting with a d(x2-y2)-wave superconducting phase, we study the self-consistently obtained electronic structure and the associated transverse dynamical spin susceptibility. In the coexisting phase of superconducting and static stripe order, the resulting particle-hole continuum can strongly damp parts of the low-energy spin-wave branches. This provides insight into recent inelastic neutron scattering data revealing the dispersion of the low-energy collective magnetic modes of lanthanum based cuprate superconductors.
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Affiliation(s)
- Brian Møller Andersen
- Ørsted Laboratory, Niels Bohr Institute, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
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10
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Tallon JL, Islam RS, Storey J, Williams GVM, Cooper JR. Isotope effect in the superfluid density of high-temperature superconducting cuprates: stripes, pseudogap, and impurities. PHYSICAL REVIEW LETTERS 2005; 94:237002. [PMID: 16090497 DOI: 10.1103/physrevlett.94.237002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Indexed: 05/03/2023]
Abstract
Underdoped cuprates exhibit a normal-state pseudogap, and their spins and doped carriers tend to spatially separate into 1D or 2D stripes. Some view these as central to superconductivity and others as peripheral and merely competing. Using La(2-x)Sr(x)Cu(1-y)Zn(y)O4 we show that an oxygen isotope effect in Tc and in the superfluid density can be used to distinguish between the roles of stripes and pseudogap and also to detect the presence of impurity scattering. We conclude that stripes and pseudogap are distinct, and both compete and coexist with superconductivity.
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Affiliation(s)
- J L Tallon
- MacDiarmid Institute, Industrial Research Ltd., P.O. Box 31310, Lower Hutt, New Zealand
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11
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Shen KM, Ronning F, Lu DH, Baumberger F, Ingle NJC, Lee WS, Meevasana W, Kohsaka Y, Azuma M, Takano M, Takagi H, Shen ZX. Nodal quasiparticles and antinodal charge ordering in Ca2-xNaxCuO2Cl2. Science 2005; 307:901-4. [PMID: 15705845 DOI: 10.1126/science.1103627] [Citation(s) in RCA: 298] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Understanding the role of competing states in the cuprates is essential for developing a theory for high-temperature superconductivity. We report angle-resolved photoemission spectroscopy experiments which probe the 4a0 x 4a0 charge-ordered state discovered by scanning tunneling microscopy in the lightly doped cuprate superconductor Ca2-xNaxCuO2Cl2. Our measurements reveal a marked dichotomy between the real- and momentum-space probes, for which charge ordering is emphasized in the tunneling measurements and photoemission is most sensitive to excitations near the node of the d-wave superconducting gap. These results emphasize the importance of momentum anisotropy in determining the complex electronic properties of the cuprates and places strong constraints on theoretical models of the charge-ordered state.
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Affiliation(s)
- Kyle M Shen
- Departments of Applied Physics, Physics, and Stanford Synchrotron Laboratory, Stanford University, Stanford, CA 94305, USA
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12
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Jeng HT, Guo GY, Huang DJ. Charge-orbital ordering and Verwey transition in magnetite. PHYSICAL REVIEW LETTERS 2004; 93:156403. [PMID: 15524911 DOI: 10.1103/physrevlett.93.156403] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2004] [Indexed: 05/12/2023]
Abstract
Local density approximation + Hubbard U (LDA + U) band structure calculations reveal that magnetite (Fe3O4) forms an insulating charge-orbital-ordered state below the Verwey transition temperature. The calculated charge ordering is in good agreement with that inferred from recent experiments. We found an associated t(2g) orbital ordering on the octahedral Fe2+ sublattice. Such an orbital ordering results primarily from the on-site Coulomb interaction. This finding unravels such fundamental issues about the Verwey transition as the mechanism for the charge ordering and for the formation of the insulating gap, as well as the nonobedience of the Anderson's criterion for the charge ordering.
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Affiliation(s)
- Horng-Tay Jeng
- Physics Division, National Center for Theoretical Sciences, Hsinchu 300, Taiwan.
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13
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Kumar N, Rao CNR. Stripes and superconductivity in cuprates--is there a connection? Chemphyschem 2003; 4:439-44. [PMID: 12785257 DOI: 10.1002/cphc.200200601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- N Kumar
- Raman Research Institute, Bangalore 560 080, India
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14
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Dumm M, Basov DN, Komiya S, Abe Y, Ando Y. Electromagnetic response of static and fluctuating stripes in cuprate superconductors. PHYSICAL REVIEW LETTERS 2002; 88:147003. [PMID: 11955170 DOI: 10.1103/physrevlett.88.147003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2001] [Indexed: 05/23/2023]
Abstract
Using infrared spectroscopy, we found that changes in the in-plane charge dynamics attributable to static stripe order in La(1.275)Nd(0.6)Sr(0.125)CuO(4) or superconductivity in La(1.875)Sr(0.125)CuO(4) are confined to energies smaller than 100 cm(-1). An absorption peak in the low- omega conductivity of the Nd-doped compound is suggestive of localization effects due to the reduced dimensionality of static charge stripes. Neither superconductivity nor static stripe ordering has a noticeable effect on the depression of the scattering rate at omega<1000 cm(-1) characteristic of the pseudogap state in other classes of moderately doped cuprates.
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Affiliation(s)
- M Dumm
- Department of Physics, University of California at San Diego, La Jolla, California 92093-0319, USA.
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15
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Wright JP, Attfield JP, Radaelli PG. Long range charge ordering in magnetite below the Verwey transition. PHYSICAL REVIEW LETTERS 2001; 87:266401. [PMID: 11800847 DOI: 10.1103/physrevlett.87.266401] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2001] [Indexed: 05/22/2023]
Abstract
The crystal structure of Fe(3)O(4) below the 122 K Verwey transition has been refined using high-resolution x-ray and neutron powder diffraction data. The refinements give direct evidence for charge ordering (CO) over four independent octahedral Fe sites, two with a charge of +2.4 and the other two of +2.6. CO schemes consistent with our model do not meet the widely accepted Anderson condition of minimum electrostatic repulsion. Instead we propose that CO is driven primarily by a [001] electronic instability, which opens a gap at the transition through a charge density wave mechanism.
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Affiliation(s)
- J P Wright
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW United Kingdom.
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16
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Zhou XJ, Yoshida T, Kellar SA, Bogdanov PV, Lu ED, Lanzara A, Nakamura M, Noda T, Kakeshita T, Eisaki H, Uchida S, Fujimori A, Hussain Z, Shen ZX. Dual nature of the electronic structure of (La(2--x--y)Nd(y)Sr(x))CuO(4) and La(1.85)Sr(0.15)CuO(4). PHYSICAL REVIEW LETTERS 2001; 86:5578-5581. [PMID: 11415305 DOI: 10.1103/physrevlett.86.5578] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2000] [Indexed: 05/23/2023]
Abstract
High resolution angle-resolved photoemission measurements have been carried out on (La(1.4--x)-Nd(0.6)Sr(x))CuO(4), a model system with static one-dimensional (1D) charge ordering (stripe), and (La(1.85)-Sr(0.15))CuO(4), a high temperature superconductor (T(c) = 40 K) with possible dynamic stripes. In addition to the straight segments near ( pi,0) and ( 0,pi) antinodal regions, we have identified the existence of spectral weight along the [1,1] nodal direction in the electronic structure of both systems. This observation of nodal state, together with the straight segments near antinodal regions, reveals the dual nature of the electronic structure of stripes due to the competition of order and disorder.
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Affiliation(s)
- X J Zhou
- Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA
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17
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Orgad D, Kivelson SA, Carlson EW, Emery VJ, Zhou XJ, Shen ZX. Evidence of electron fractionalization from photoemission spectra in the high temperature superconductors. PHYSICAL REVIEW LETTERS 2001; 86:4362-4365. [PMID: 11328175 DOI: 10.1103/physrevlett.86.4362] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2000] [Indexed: 05/23/2023]
Abstract
In the normal state of the high temperature superconductors Bi(2)Sr(2)CaCu(2)O(8+delta) and La2(-x)Sr(x)CuO4, and in the related "stripe ordered" material, La(1.25)Nd(0.6)Sr(0.15)CuO4, there is sharp structure in the measured single hole spectral function, A<(k-->,omega), considered as a function of k--> at fixed small binding energy omega. At the same time, as a function of omega at fixed k--> on much of the putative Fermi surface, any structure in A<(k-->,omega), other than the Fermi cutoff, is very broad. This is characteristic of the situation in which there are no stable excitations with the quantum numbers of the electron, as is the case in the one-dimensional electron gas.
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Affiliation(s)
- D Orgad
- Department of Physics, U.C.L.A., Los Angeles, California 90095. USA
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18
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Room-temperature electronic phase transitions in the continuous phase diagrams of perovskite manganites. Nature 2000; 406:704-8. [PMID: 10963590 DOI: 10.1038/35021018] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Highly correlated electronic systems--such as transition-metal oxides that are doped Mott insulators--are complex systems which exhibit puzzling phenomena, including high-temperature superconductivity and colossal magnetoresistivity. Recent studies suggest that in such systems collective electronic phenomena are important, arising from long-range Coulomb interactions and magnetic effects. The qualitative behaviour of these systems is strongly dependent on charge filling (the level of doping) and the lattice constant. Here we report a time-efficient and systematic experimental approach for studying the phase diagrams of condensed-matter systems. It involves the continuous mapping of the physical properties of epitaxial thin films of perovskite manganites (a class of doped Mott insulator) as their composition is varied. We discover evidence that suggests the presence of phase boundaries of electronic origin at room temperature.
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19
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Feng DL, Lu DH, Shen KM, Kim C, Eisaki H, Damascelli A, Yoshizaki R, Shimoyama J, Kishio K, Gu GD, Oh S, Andrus A, O'Donnell J, Eckstein JN, Shen Z. Signature of superfluid density in the single-particle excitation spectrum of Bi(2)Sr(2)CaCu(2)O(8+delta). Science 2000; 289:277-81. [PMID: 10894771 DOI: 10.1126/science.289.5477.277] [Citation(s) in RCA: 224] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
We report that the doping and temperature dependence of photoemission spectra near the Brillouin zone boundary of Bi(2)Sr(2)CaCu(2)O(8+delta)exhibit unexpected sensitivity to the superfluid density. In the superconducting state, the photoemission peak intensity as a function of doping scales with the superfluid density and the condensation energy. As a function of temperature, the peak intensity shows an abrupt behavior near the superconducting phase transition temperature where phase coherence sets in, rather than near the temperature where the gap opens. This anomalous manifestation of collective effects in single-particle spectroscopy raises important questions concerning the mechanism of high-temperature superconductivity.
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Affiliation(s)
- DL Feng
- Department of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA. Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan. Department of Applied Chem
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20
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Fleck M, Lichtenstein AI, Pavarini E, Oles AM. One-dimensional metallic behavior of the stripe phase in La2-xSrxCuO4. PHYSICAL REVIEW LETTERS 2000; 84:4962-4965. [PMID: 10990842 DOI: 10.1103/physrevlett.84.4962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Indexed: 05/23/2023]
Abstract
Using an exact diagonalization method within the dynamical mean-field theory we found stable stripe phases in the two-dimensional Hubbard model doped by 0.03<delta<0.2 holes, with a crossover from diagonal to vertical site-centered stripes at doping delta approximately 0.05. The doping dependence of the size of magnetic domains and chemical potential shift Delta&mgr; approximately -delta(2) are in quantitative agreement with the experimental results for La2-xSrxCuO4. The one-dimensional metallic behavior along the domain walls explains the observed suppression of spectral weight along the Brillouin zone diagonal.
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Affiliation(s)
- M Fleck
- Max-Planck-Institut fur Festkorperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
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21
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Chernyshev AL, Bishop AR. Metallic stripe in two dimensions: stability and spin-charge separation. PHYSICAL REVIEW LETTERS 2000; 84:4922-4925. [PMID: 10990832 DOI: 10.1103/physrevlett.84.4922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/1999] [Indexed: 05/23/2023]
Abstract
The problems of charge stripe formation, spin-charge separation, and stability of the antiphase domain wall (ADW) associated with a stripe are addressed using an analytical approach to the t- J(z) model. We show that a metallic stripe together with its ADW is the ground state of the problem in the low doping regime. The stripe is described as a system of spinons and magnetically confined holons strongly coupled to the two dimensional spin environment with holon-spin-polaron elementary excitations filling a one-dimensional band.
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Affiliation(s)
- AL Chernyshev
- Department of Physics, University of California, Riverside, California 92521, USA
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Abstract
The high-temperature copper oxide superconductors are of fundamental and enduring interest. They not only manifest superconducting transition temperatures inconceivable 15 years ago, but also exhibit many other properties apparently incompatible with conventional metal physics. The materials expand our notions of what is possible, and compel us to develop new experimental techniques and theoretical concepts. This article provides a perspective on recent developments and their implications for our understanding of interacting electrons in metals.
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Affiliation(s)
- J Orenstein
- Department of Physics, University of California, Berkeley, CA 94720, USA, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Department of Physics and Astronomy, Rutgers University, Piscataway, NJ
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Abstract
The growing body of experimental evidence for the existence of complex textures of charges and spins in the high-temperature superconductors has drawn attention to the so-called 'stripe-phase' models as a possible basis for the mechanism of superconductivity in these materials. Such observations have until now been restricted to systems where the texture dynamics are slow or suppressed altogether, and do not include the important case of YBa2Cu3O(7-delta). It seems likely that the dynamic behaviour of stripes, which has been suggested to undergo several phase transitions as a function of temperature, should also be reflected in the lattice properties of the host materials, and this forms the motivation for our present experiments. Specifically, we use MeV helium ion channelling, an ultrafast real-space probe of atomic displacements (with sub-picometre resolution), to probe incoherent lattice fluctuations in YBa2Cu3O(7-delta) as a function of temperature and oxygen doping. We detect lattice fluctuations that are larger than the expected thermal vibration component, and which show anomalies characteristic of the phase transitions anticipated for a dynamic stripe phase. Comparison of our lattice results with single-particle-tunnelling and photoemission data highlights the importance of spin-charge separation phenomena in the copper oxide superconductors.
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Zhou XJ, Bogdanov P, Kellar SA, Noda T, Eisaki H, Uchida S, Hussain Z, Shen Z. One-Dimensional Electronic Structure and Suppression of d-Wave Node State in (La(1.28)Nd(0.6)Sr(0.12))CuO(4). Science 1999; 286:268-272. [PMID: 10514366 DOI: 10.1126/science.286.5438.268] [Citation(s) in RCA: 202] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Angle-resolved photoemission spectroscopy was carried out on (La(1.28)Nd(0.6) Sr(0.12))CuO(4), a model system of the charge- and spin-ordered state, or stripe phase. The electronic structure contains characteristic features consistent with other cuprates, such as the flat band at low energy near the Brillouin zone face. However, the low-energy excitation near the expected d-wave node region is strongly suppressed. The frequency-integrated spectral weight is confined inside one-dimensional segments in the momentum space (defined by horizontal momenta &cjs3539;k(x)&cjs3539; = pi/4 and vertical momenta &cjs3539;k(y)&cjs3539; = pi/4), deviating strongly from the more rounded Fermi surface expected from band calculations. This departure from the two-dimensional Fermi surface persists to a very high energy scale. These results provide important information for establishing a theory to understand the charge and spin ordering in cuprates and their relation with high-temperature superconductivity.
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Affiliation(s)
- XJ Zhou
- Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA. Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, CA 94720, USA. Department of Superconductivity, University of Tokyo, Yayoi 2-11-16, Bunkyo-ku, Tokyo 133, Japan
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Affiliation(s)
- A. V. Balatsky
- A. Balatsky [] is with the Condensed Matter Group, Theory Division, Los National Laboratory, Los Alamos, NM 87545, USA
| | - Z.-X. Shen
- Z.-X. Shen [] is in the Departments of Physics and Applied Physics and the Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA
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Perali A, Castellani C, Grilli M. d-wave superconductivity near charge instabilities. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:16216-16225. [PMID: 9985700 DOI: 10.1103/physrevb.54.16216] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tranquada JM, Axe JD, Ichikawa N, Nakamura Y, Uchida S, Nachumi B. Neutron-scattering study of stripe-phase order of holes and spins in La1.48Nd0.4Sr0.12CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7489-7499. [PMID: 9984376 DOI: 10.1103/physrevb.54.7489] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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