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Abstract
The basic features of multi-band superconductivity and its implications are derived. In particular, it is shown that enhancements of the superconducting transition temperature take place due to interband interactions. In addition, isotope effects differ substantially from the typical BCS scheme as soon as polaronic coupling effects are present. Special cases of the model are polaronic coupling in one band as realized e.g., in cuprates, coexistence of a flat band and a steep band like in MgB2, crossovers between extreme cases. The advantages of the multiband approach as compared to the single band BCS model are elucidated and its rather frequent realization in actual systems discussed.
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Bussmann-Holder A, Keller H. Isotope and multiband effects in layered superconductors. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:233201. [PMID: 22551702 DOI: 10.1088/0953-8984/24/23/233201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this review we consider three classes of superconductors, namely cuprate superconductors, MgB(2) and the new Fe based superconductors. All of these three systems are layered materials and multiband compounds. Their pairing mechanisms are under discussion with the exception of MgB(2), which is widely accepted to be a 'conventional' electron-phonon interaction mediated superconductor, but extending the Bardeen-Cooper-Schrieffer (BCS) theory to account for multiband effects. Cuprates and Fe based superconductors have higher superconducting transition temperatures and more complex structures. Superconductivity is doping dependent in these material classes unlike in MgB(2) which, as a pure compound, has the highest values of T(c) and a rapid suppression of superconductivity with doping takes place. In all three material classes isotope effects have been observed, including exotic ones in the cuprates, and controversial ones in the Fe based materials. Before the area of high-temperature superconductivity, isotope effects on T(c) were the signature for phonon mediated superconductivity-even when deviations from the BCS value to smaller values were observed. Since the discovery of high T(c) materials this is no longer evident since competing mechanisms might exist and other mediating pairing interactions are discussed which are of purely electronic origin. In this work we will compare the three different material classes and especially discuss the experimentally observed isotope effects of all three systems and present a rather general analysis of them. Furthermore, we will concentrate on multiband signatures which are not generally accepted in cuprates even though they are manifest in various experiments, the evidence for those in MgB(2), and indications for them in the Fe based compounds. Mostly we will consider experimental data, but when possible also discuss theoretical models which are suited to explain the data.
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Affiliation(s)
- Guo-meng Zhao
- a Physik-Institut der Universität Zürich , CH-8057 Zürich, Switzerland
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Shen ZX, Lanzara A, Ishihara S, Nagaosa N. Role of the electron-phonon interaction in the strongly correlated cuprate superconductors. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810208220725] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Z.-X. Shen
- a Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory , Stanford University , California , 94305 , USA
| | - A. Lanzara
- a Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory , Stanford University , California , 94305 , USA
- b Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley , California , 94720 , USA
| | - S. Ishihara
- c Department of Applied Physics , University of Tokyo , Bunkyo-ku, Tokyo , 113-8656 , Japan
| | - N. Nagaosa
- c Department of Applied Physics , University of Tokyo , Bunkyo-ku, Tokyo , 113-8656 , Japan
- d Correlated Electron Research Center, Agency of Industrial Science and Technology , Tsukuba , 305-0046 , Japan
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Chen XJ, Struzhkin VV, Wu Z, Lin HQ, Hemley RJ, Mao HK. Unified picture of the oxygen isotope effect in cuprate superconductors. Proc Natl Acad Sci U S A 2007; 104:3732-5. [PMID: 17360421 PMCID: PMC1820652 DOI: 10.1073/pnas.0611473104] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
High-temperature superconductivity in cuprates was discovered almost exactly 20 years ago, but a satisfactory theoretical explanation for this phenomenon is still lacking. The isotope effect has played an important role in establishing electron-phonon interaction as the dominant interaction in conventional superconductors. Here we present a unified picture of the oxygen isotope effect in cuprate superconductors based on a phonon-mediated d-wave pairing model within the Bardeen-Cooper-Schrieffer theory. We show that this model accounts for the magnitude of the isotope exponent as functions of the doping level as well as the variation between different cuprate superconductors. The isotope effect on the superconducting transition is also found to resemble the effect of pressure on the transition. These results indicate that the role of phonons should not be overlooked for explaining the superconductivity in cuprates.
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Affiliation(s)
- Xiao-Jia Chen
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA.
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Kato T, Kondo M, Tachibana M, Yamabe T, Yoshizawa K. Vibronic interaction in a copper oxide cluster. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00431-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Andergassen S, Caprara S, Di Castro C, Grilli M. Anomalous isotopic effect near the charge-ordering quantum criticality. PHYSICAL REVIEW LETTERS 2001; 87:056401. [PMID: 11497793 DOI: 10.1103/physrevlett.87.056401] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2000] [Indexed: 05/23/2023]
Abstract
Within the Hubbard-Holstein model, we evaluate the crossover lines marking the opening of pseudogaps in the cuprates, which, in our scenario, are ruled by the proximity to a charge-ordering quantum criticality (stripe formation). We find that their isotopic dependence, due to critical fluctuations, implies a substantial positive shift of the pseudogap-formation temperature T(*). We infer that the isotopic shift of the superconducting T(c) is nearly absent in the optimally and overdoped regimes and is negative and increasing upon underdoping. The dynamical nature of the charge-ordering transition may explain the spread of the experimental values of T(*).
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Affiliation(s)
- S Andergassen
- Istituto Nazionale per la Fisica della Materia, Unità di Roma 1, Italy
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Hole-Doped La1.85Sr0.15CuO4–δXσ(X=F, Cl) and Electron-Doped Nd1.85Ce0.15CuO4–δXσ Halo-Oxide Catalysts for the Selective Oxidation of Ethane to Ethene. J Catal 2001. [DOI: 10.1006/jcat.2000.3092] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Hofer J, Conder K, Sasagawa T, Zhao G, Willemin M, Keller H, Kishio K. Oxygen-isotope effect on the In-plane penetration depth in underdoped La2-xSrxCuO4 single crystals. PHYSICAL REVIEW LETTERS 2000; 84:4192-4195. [PMID: 10990643 DOI: 10.1103/physrevlett.84.4192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/1999] [Indexed: 05/23/2023]
Abstract
We report measurements of the oxygen-isotope effect (OIE) on the in-plane penetration depth lambda(ab)(0) in underdoped La2-xSrxCuO4 single crystals. A highly sensitive magnetic torque sensor with a resolution of Deltatau approximately 10(-12) N m was used for the magnetic measurements on microcrystals with a mass of approximately 10 &mgr;g. The OIE on lambda(-2)(ab)(0) is found to be -10(2)% for x = 0.080 and -8(1)% for x = 0.086. It arises mainly from the oxygen-mass dependence of the in-plane effective mass m(*)(ab). The present results suggest that lattice vibrations are important for the occurrence of high temperature superconductivity.
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Affiliation(s)
- J Hofer
- Physik-Institut der Universitat Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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Isotope Effect in High- TC
Superconductors due to Non-Adiabaticity, Proximity Effect and Magnetic Impurities*. Z PHYS CHEM 1997. [DOI: 10.1524/zpch.1997.201.part_1_2.271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhao G, Kirtikar V, Singh KK, Sinha AP, Morris DE, Inyushkin AV. Large copper isotope effect in oxygen depleted YBa2Cu3Oy: Importance of Cu-dominated phonon modes in the pairing mechanism. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:14956-14959. [PMID: 9985545 DOI: 10.1103/physrevb.54.14956] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhao G, Ager JW, Morris DE. Site dependence of large oxygen isotope effect in Y0.7Pr0.3Ba2Cu3O6.97. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:14982-14985. [PMID: 9985552 DOI: 10.1103/physrevb.54.14982] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fisher RA, Gordon JE, Phillips NE. SOME CHEMICAL AND STRUCTURAL EFFECTS ON THE PROPERTIES OF HIGH-Tc SUPERCONDUCTORS. Annu Rev Phys Chem 1996. [DOI: 10.1146/annurev.physchem.47.1.283] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
▪ Abstract The history of superconductivity, including superconductivity in the high-Tc cuprates, is reviewed very briefly, and the differences between conventional superconductors and the high-Tc cuprates are summarized. The basic crystal structures of the major series of high-Tc cuprates are described and compared. The relation of structures to superconducting properties is reviewed with an emphasis on the orthorhombic-tetragonal transition in (La2−x Srx)CuO4; the corresponding transition, and also the transition to the low-temperature tetragonal phase in (La2−xBax)CuO4; and the effects of oxygen vacancies, oxygen-vacancy ordering, frozen-in disorder, and occupation of the off-chain O(5) sites in YBa2Cu3O7−δ. The effects of chemical substitutions of lanthanide elements on the La/Sr sites in (La2−xSrx)CuO4 and on the Y sites in YBa2Cu3O7−δ, and of 3d elements and sp elements on the Cu sites in both systems are reviewed. The difference between the effects of the lanthanide substitutions, particularly Pr, in the two systems are considered. Major properties of the Bi-, Tl-, and Hg-cuprates, are described briefly. A comparison of the high-Tc cuprates with noncuprate oxide superconductors is given.
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Affiliation(s)
- R. A. Fisher
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - J. E. Gordon
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
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Normand B, Kohno H, Fukuyama H. Spin-phonon coupling in the single-layer extended t-J model. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:856-870. [PMID: 9983042 DOI: 10.1103/physrevb.53.856] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Schüttler H, Pao C. Isotope effect in d-wave superconductors. PHYSICAL REVIEW LETTERS 1995; 75:4504-4507. [PMID: 10059925 DOI: 10.1103/physrevlett.75.4504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Sherman A, Schreiber M. Strong-coupling superconductivity in the two-dimensional t-J model supplemented by a hole-phonon interaction. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:10621-10625. [PMID: 9980115 DOI: 10.1103/physrevb.52.10621] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hocquet T, Jardin J, Germain P, Labbé J. Dependence of Tc on the physical parameters in single-layered copper oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:10330-10335. [PMID: 9980084 DOI: 10.1103/physrevb.52.10330] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Zhao G, Singh KK, Sinha AP, Morris DE. Oxygen isotope effect on the effective mass of carriers from magnetic measurements on La2-xSrxCuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6840-6844. [PMID: 9981913 DOI: 10.1103/physrevb.52.6840] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Varshney D, Singh RK. Superconductivity in lanthanum cuprates: A layered-electron-gas model. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:7629-7636. [PMID: 9979707 DOI: 10.1103/physrevb.52.7629] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dmowski W, McQueeney RJ, Egami T, Feng YP, Sinha SK, Hinatsu T, Uchida S. Temperature-dependent x-ray diffuse scattering from single crystals of La2-xSrxCuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6829-6839. [PMID: 9981912 DOI: 10.1103/physrevb.52.6829] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Soerensen G, Gygax S. Evaluation of oxygen isotope experiments on Pr-, Ca-, and Zn-substituted YBa2Cu3O7. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:11848-11859. [PMID: 9977927 DOI: 10.1103/physrevb.51.11848] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yndurain F. Model for the variation upon doping of the isotope coefficient in high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8494-8497. [PMID: 9977463 DOI: 10.1103/physrevb.51.8494] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Koyama Y, Wakabayashi Y, Ito K, Inoue Y. Low-temperature structural transitions and Tc suppression in La2-xMxCuO4 (M=Ba, Sr). PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9045-9051. [PMID: 9977544 DOI: 10.1103/physrevb.51.9045] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zech D, Keller H, Conder K, Kaldis E, Liarokapis E, Poulakis N, Müller KA. Site-selective oxygen isotope effect in optimally doped YBa2Cu3O6 + x. Nature 1994. [DOI: 10.1038/371681a0] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhao G, Morris DE. Sizable oxygen isotope effects in the electron-doped Pr1.85Ce0.15CuO4-y. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3454-3457. [PMID: 9976610 DOI: 10.1103/physrevb.50.3454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhao G, Singh KK, Morris DE. Oxygen isotope effect on Néel temperature in various antiferromagnetic cuprates. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:4112-4117. [PMID: 9976694 DOI: 10.1103/physrevb.50.4112] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Goicochea AG. High-temperature superconductivity in the Van Hove scenario. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:6864-6868. [PMID: 10009411 DOI: 10.1103/physrevb.49.6864] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Krishnamurthy HR, Newns DM, Pattnaik PC, Tsuei CC, Chi CC. Vertex correction to pairing at a Van Hove singularity. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3520-3523. [PMID: 10011217 DOI: 10.1103/physrevb.49.3520] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kresin VZ, Wolf SA. Microscopic model for the isotope effect in the high-Tc oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3652-3654. [PMID: 10011248 DOI: 10.1103/physrevb.49.3652] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kim JH, Tesanovic Z. Effects of strong Coulomb correlations on the phonon-mediated superconductivity: A model inspired by Copper oxides. PHYSICAL REVIEW LETTERS 1993; 71:4218-4221. [PMID: 10055186 DOI: 10.1103/physrevlett.71.4218] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ting W, Fossheim K. Structural phase transitions in La2-x(Ba,Sr)xCuO4-y and related physical properties. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:16751-16768. [PMID: 10008260 DOI: 10.1103/physrevb.48.16751] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bornemann HJ, Morris DE, Sinha AP, Chandrachood MR, Liu HB. Modification of the oxygen-isotope effect in high-temperature superconductors due to transition-metal doping. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9803-9809. [PMID: 10007231 DOI: 10.1103/physrevb.48.9803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Franck JP, Harker S, Brewer JH. Copper and oxygen isotope effects in La2-xSrxCuO4. PHYSICAL REVIEW LETTERS 1993; 71:283-286. [PMID: 10054910 DOI: 10.1103/physrevlett.71.283] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Crespi VH, Cohen ML. Anharmonic phonons and high-temperature superconductivity. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:398-406. [PMID: 10006790 DOI: 10.1103/physrevb.48.398] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Billinge SJ, Egami T. Short-range atomic structure of Nd2-xCexCuO4-y determined by real-space refinement of neutron-powder-diffraction data. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:14386-14406. [PMID: 10005789 DOI: 10.1103/physrevb.47.14386] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Licheron M, Gervais F. Ba2-xKxPb1-yBiyO4- delta : Layered oxides with insulating or conducting properties and possible superconducting properties. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8008-8015. [PMID: 10004810 DOI: 10.1103/physrevb.47.8008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ozhogin V, Babushkina N, Inyushkin A, Taldenkov A, Molchanova L. Anomalously enhanced oxygen isotope effect in La1.85Sr0.15CuO4 doped with Fe. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0964-1807(93)90245-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Goodenough JB, Zhou J, Chan J. Copper oxide superconductors: A distinguishable thermodynamic state. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5275-5286. [PMID: 10006694 DOI: 10.1103/physrevb.47.5275] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hirsch JE. Polaronic superconductivity in the absence of electron-hole symmetry. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5351-5358. [PMID: 10006701 DOI: 10.1103/physrevb.47.5351] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nickel JH, Morris DE, Ager JW. Locus of pairing interaction in YBa2Cu3O7 by site-selective oxygen isotope shift: 18O in CuO2 plane layers. PHYSICAL REVIEW LETTERS 1993; 70:81-84. [PMID: 10053263 DOI: 10.1103/physrevlett.70.81] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Schneider T, Keller H. Universal trends in extreme type-II superconductors. PHYSICAL REVIEW LETTERS 1992; 69:3374-3377. [PMID: 10046802 DOI: 10.1103/physrevlett.69.3374] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Lenck S, Carbotte JP. Model calculation for electronic pairing in copper oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14850-14856. [PMID: 10003585 DOI: 10.1103/physrevb.46.14850] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Alexandrov AS. Transition from Fermi liquid to charged Bose liquid: A possible explanation of the isotope shift in high-Tc oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14932-14935. [PMID: 10003605 DOI: 10.1103/physrevb.46.14932] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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45
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Penn DR, Cohen ML. Effects of broadening on BCS theory in the presence of Van Hove singularities. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:5466-5469. [PMID: 10004330 DOI: 10.1103/physrevb.46.5466] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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46
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Newns DM, Krishnamurthy HR, Pattnaik PC, Tsuei CC, Kane CL. Saddle-point pairing: An electronic mechanism for superconductivity. PHYSICAL REVIEW LETTERS 1992; 69:1264-1267. [PMID: 10047169 DOI: 10.1103/physrevlett.69.1264] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Xiong Q, Chu JW, Sun YY, Feng HH, Bud'ko S, Hor PH, Chu CW. High-pressure study of the anomalous isotope effect in La2-xAxCuO4 with A=Sr or Ba. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:581-584. [PMID: 10002263 DOI: 10.1103/physrevb.46.581] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Varoy CR, Trodahl HJ, Buckley RG, Kaiser AB. Thermopower of Bi2-xPbxSr2CaCu2O8+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:463-468. [PMID: 10002233 DOI: 10.1103/physrevb.46.463] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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High-temperature superconductivity: The roles of soft-phonon driven structural phase transitions and biphonon-electron coupling. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01313824] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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