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Xie T, Liu C, Kajimoto R, Ikeuchi K, Li S, Luo H. Spin fluctuations in the 112-type iron-based superconductor Ca 0.82La 0.18Fe 0.96Ni 0.04As 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:474001. [PMID: 36137515 DOI: 10.1088/1361-648x/ac9441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
We report time-of-flight inelastic neutron scattering (INS) investigations on the spin fluctuation spectrum in the 112-type iron-based superconductor (FeSC) Ca0.82La0.18Fe0.96Ni0.04As2(CaLa-112). In comparison to the 122-type FeSCs with a centrosymmetric tetragonal lattice structure (space groupI4/mmm) at room temperature and an in-plane stripe-type antiferromagnetic (AF) order at low temperature, the 112 system has a noncentrosymmetric structure (space groupP21) with additional zigzag arsenic chains between Ca/La layers and a magnetic ground state with similar wavevectorQAFbut different orientations of ordered moments in the parent compounds. Our INS study clearly reveals that the in-plane dispersions and the bandwidth of spin excitations in the superconducting CaLa-112 closely resemble to those in 122 systems. While the total fluctuating moments⟨m2⟩≈4.6±0.2μB2/Fe are larger than 122 system, the dynamic correlation lengths are similar (ξ ≈ 10 Å). These results suggest that superconductivity in iron arsenides may have a common magnetic origin under similar magnetic exchange couplings with a dual nature from local moments and itinerant electrons, despite their different magnetic patterns and lattice symmetries.
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Affiliation(s)
- Tao Xie
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States of America
| | - Chang Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Ryoichi Kajimoto
- Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Kazuhiko Ikeuchi
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society, Tokai, Ibaraki 319-1106, Japan
| | - Shiliang Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
| | - Huiqian Luo
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
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Persistent high-energy spin excitations in iron-pnictide superconductors. Nat Commun 2013; 4:1470. [DOI: 10.1038/ncomms2428] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 01/02/2013] [Indexed: 11/08/2022] Open
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Fujita M, Nakagawa M, Frost CD, Yamada K. High-energy spin excitations in heavily electron-doped Pr1−xLaCexCuO4. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/108/1/012006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lipscombe OJ, Hayden SM, Vignolle B, McMorrow DF, Perring TG. Persistence of high-frequency spin fluctuations in overdoped superconducting La2-xSrxCuO4 (x=0.22). PHYSICAL REVIEW LETTERS 2007; 99:067002. [PMID: 17930856 DOI: 10.1103/physrevlett.99.067002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Indexed: 05/25/2023]
Abstract
We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La(1.78)Sr(0.22)CuO(4) for the energy range 0-160 meV. Our measurements show that overdoping suppresses the strong response present for optimally doped La(2-x)Sr(x)CuO(4) which is peaked near 50 meV. The remaining response is peaked at incommensurate wave vectors for all energies investigated. We observe a strong high-frequency magnetic response for E approximately >80 meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.
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Affiliation(s)
- O J Lipscombe
- H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
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Wakimoto S, Yamada K, Tranquada JM, Frost CD, Birgeneau RJ, Zhang H. Disappearance of antiferromagnetic spin excitations in overdoped La2-xSrxCuO4. PHYSICAL REVIEW LETTERS 2007; 98:247003. [PMID: 17677985 DOI: 10.1103/physrevlett.98.247003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Indexed: 05/16/2023]
Abstract
Magnetic excitations for energies up to approximately 100 meV are studied for overdoped La(2-x)Sr(x)CuO(4) with x=0.25 and 0.30, using time-of-flight neutron spectroscopy. Comparison of spectra integrated over the width of an antiferromagnetic Brillouin zone demonstrates that the magnetic scattering at intermediate energies, 20 <or= omega <or= 100 meV, progressively decreases with overdoping. This strongly suggests that the magnetism is not related to Fermi surface nesting, but rather is associated with a decreasing volume fraction of (probably fluctuating) antiferromagnetic bubbles.
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Affiliation(s)
- S Wakimoto
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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Wilson SD, Li S, Woo H, Dai P, Mook HA, Frost CD, Komiya S, Ando Y. High-energy spin excitations in the electron-doped superconductor Pr(0.88)LaCe(0.12)CuO(4-delta) with T(c) = 21 K. PHYSICAL REVIEW LETTERS 2006; 96:157001. [PMID: 16712186 DOI: 10.1103/physrevlett.96.157001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Indexed: 05/09/2023]
Abstract
We use high-resolution inelastic neutron scattering to study the low-temperature magnetic excitations of the electron-doping superconductor Pr(0.88)LaCe(0.12)CuO(4-delta) (T(c) = 21 +/- 1 K) over a wide energy range (4 meV < or = homega < or = 330 meV). The effect of electron doping is to cause a wave vector (Q) broadening in the low-energy (homega < or = 80 meV) commensurate spin fluctuations at (0.5, 0.5) and to suppress the intensity of spin-wave-like excitations at high energies (homega > or = 100 meV). This leads to a substantial redistribution in the spectrum of the local dynamical spin susceptibility chi''(omega), and reveals a new energy scale similar to that of the lightly hole-doped YB2Cu3O(6.353) (T(c) = 18 K).
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Affiliation(s)
- Stephen D Wilson
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
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7
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Zhou XJ, Shi J, Yoshida T, Cuk T, Yang WL, Brouet V, Nakamura J, Mannella N, Komiya S, Ando Y, Zhou F, Ti WX, Xiong JW, Zhao ZX, Sasagawa T, Kakeshita T, Eisaki H, Uchida S, Fujimori A, Zhang Z, Plummer EW, Laughlin RB, Hussain Z, Shen ZX. Multiple bosonic mode coupling in the electron self-energy of (La2-xSrx)CuO4. PHYSICAL REVIEW LETTERS 2005; 95:117001. [PMID: 16197033 DOI: 10.1103/physrevlett.95.117001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2004] [Indexed: 05/04/2023]
Abstract
High resolution angle-resolved photoemission spectroscopy data along the (0,0)-(pi,pi) nodal direction with significantly improved statistics reveal fine structure in the electron self-energy of the underdoped (La2-xSrx)CuO4 samples in the normal state. Fine structure at energies of (40-46) meV and (58-63) meV, and possible fine structure at energies of (23-29) meV and (75-85) meV, have been identified. These observations indicate that, in (La2-xSrx)CuO4, more than one bosonic modes are involved in the coupling with electrons.
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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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Tranquada JM, Woo H, Perring TG, Goka H, Gu GD, Xu G, Fujita M, Yamada K. Quantum magnetic excitations from stripes in copper oxide superconductors. Nature 2004; 429:534-8. [PMID: 15175745 DOI: 10.1038/nature02574] [Citation(s) in RCA: 514] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2004] [Accepted: 04/16/2004] [Indexed: 11/09/2022]
Abstract
In the copper oxide parent compounds of the high-transition-temperature superconductors the valence electrons are localized--one per copper site--by strong intra-atomic Coulomb repulsion. A symptom of this localization is antiferromagnetism, where the spins of localized electrons alternate between up and down. Superconductivity appears when mobile 'holes' are doped into this insulating state, and it coexists with antiferromagnetic fluctuations. In one approach to describing the coexistence, the holes are believed to self-organize into 'stripes' that alternate with antiferromagnetic (insulating) regions within copper oxide planes, which would necessitate an unconventional mechanism of superconductivity. There is an apparent problem with this picture, however: measurements of magnetic excitations in superconducting YBa2Cu3O6+x near optimum doping are incompatible with the naive expectations for a material with stripes. Here we report neutron scattering measurements on stripe-ordered La1.875Ba0.125CuO4. We show that the measured excitations are, surprisingly, quite similar to those in YBa2Cu3O6+x (refs 9, 10) (that is, the predicted spectrum of magnetic excitations is wrong). We find instead that the observed spectrum can be understood within a stripe model by taking account of quantum excitations. Our results support the concept that stripe correlations are essential to high-transition-temperature superconductivity.
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Affiliation(s)
- J M Tranquada
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
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9
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Zhou XJ, Yoshida T, Lee DH, Yang WL, Brouet V, Zhou F, Ti WX, Xiong JW, Zhao ZX, Sasagawa T, Kakeshita T, Eisaki H, Uchida S, Fujimori A, Hussain Z, Shen ZX. Dichotomy between nodal and antinodal quasiparticles in underdoped (La2-xSrx)CuO4 superconductors. PHYSICAL REVIEW LETTERS 2004; 92:187001. [PMID: 15169524 DOI: 10.1103/physrevlett.92.187001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2003] [Indexed: 05/24/2023]
Abstract
High resolution angle-resolved photoemission measurements on an underdoped (La(2-x)Srx)CuO4 system show that, at energies below 70 meV, the quasiparticle peak is well defined around the (pi/2,pi/2) nodal region and disappears rather abruptly when the momentum is changed from the nodal point to the (pi,0) antinodal point along the underlying "Fermi surface." It indicates that there is an extra low energy scattering mechanism acting upon the antinodal quasiparticles. We propose that this mechanism is the scattering of quasiparticles across the nearly parallel segments of the Fermi surface near the antinodes.
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Affiliation(s)
- X J Zhou
- Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA
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10
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Magnetized States of Quantum Spin Chains. ACTA ACUST UNITED AC 2002. [DOI: 10.1007/3-540-45649-x_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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11
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Optical Spectroscopic Studies of Metal-Insulator Transitions in Perovskite-Related Oxides. STRUCTURE AND BONDING 2001. [DOI: 10.1007/3-540-45503-5_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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12
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Dai P, Mook HA, Hayden SM, Aeppli G, Perring TG, Hunt RD, Dogan F. The magnetic excitation spectrum and thermodynamics of high-Tc superconductors. Science 1999; 284:1344-7. [PMID: 10334986 DOI: 10.1126/science.284.5418.1344] [Citation(s) in RCA: 244] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Inelastic neutron scattering was used to study the wave vector- and frequency-dependent magnetic fluctuations in single crystals of superconducting YBa2Cu3O6+x. The spectra contain several important features, including a gap in the superconducting state, a pseudogap in the normal state, and the much-discussed resonance peak. The appearance of the pseudogap determined from transport and nuclear resonance coincides with formation of the resonance in the magnetic excitations. The exchange energy associated with the resonance has the temperature and doping dependences as well as the magnitude to describe approximately the electronic specific heat near the superconducting transition temperature (Tc).
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Affiliation(s)
- P Dai
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6393, USA. H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK. NEC Research Institute, 4 Independence Way, Princeton, NJ 08540, USA. Rutherford Appl
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Schüttler H, Norman MR. Contrasting dynamic spin susceptibility models and their relation to high-temperature superconductivity. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:13295-13305. [PMID: 9985193 DOI: 10.1103/physrevb.54.13295] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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15
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Zhou J, Goodenough JB. Testing the relation of a spin gap to superconductivity in the copper oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:11997-11998. [PMID: 9985051 DOI: 10.1103/physrevb.54.11997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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16
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Varma CM. NMR in Copper-Oxide Metals. PHYSICAL REVIEW LETTERS 1996; 77:3431-3434. [PMID: 10062218 DOI: 10.1103/physrevlett.77.3431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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17
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Fong HF, Keimer B, Reznik D, Milius DL, Aksay IA. Polarized and unpolarized neutron-scattering study of the dynamical spin susceptibility of YBa2Cu3O7. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:6708-6720. [PMID: 9986691 DOI: 10.1103/physrevb.54.6708] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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18
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Hayden SM, Aeppli G, Perring TG, Mook HA, Dogan F. High-frequency spin waves in YBa2Cu3O6.15. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R6905-R6908. [PMID: 9984410 DOI: 10.1103/physrevb.54.r6905] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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