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Solovjov AL, Omelchenko LV, Petrenko EV, Vovk RV, Khotkevych VV, Chroneos A. Peculiarities of pseudogap in Y 0.95Pr 0.05Ba 2Cu 3O 7-δ single crystals under pressure up to 1.7 GPa. Sci Rep 2019; 9:20424. [PMID: 31892715 PMCID: PMC6938474 DOI: 10.1038/s41598-019-55959-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/30/2019] [Indexed: 11/09/2022] Open
Abstract
The effect of hydrostatic pressure up to P = 1.7 GPa on the fluctuation conductivity σ'(T) and pseudogap ∆*(T) in Y0.95Pr0.05Ba2Cu3O7-δ single crystal with critical temperature Тс = 85.2 K (at P = 0) was investigated. The application of pressure leads to the increase in Tc with dTc/dP = +1.82 K∙GPa-1 while the resistance decreases as dlnρ(100 K)/dP = -(10.5 ± 0.2) %∙GPa-1. Regardless of the pressure, in the temperature interval from Tc to T0 (~88 K at P = 0) the behaviour of σ'(T) is well described by the Aslamazov - Larkin (AL - 3D) fluctuation theory, and above the T0 by the Lawrence - Doniach theory (LD). The Maki-Thompson (MT - 2D) fluctuation contribution is not observed. This indicates the presence of structural defects in the sample induced by Pr. Here it is determined for the first time that when the pressure is applied to the Y1-xPrxBa2Cu3O7-δ single crystal, the pseudogap increases as dlnΔ*/dP = 0.17 GPa-1.
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Affiliation(s)
- A L Solovjov
- B. Verkin Institute for Low Temperature Physics and Engineering, NAN of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine
| | - L V Omelchenko
- B. Verkin Institute for Low Temperature Physics and Engineering, NAN of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine
| | - E V Petrenko
- B. Verkin Institute for Low Temperature Physics and Engineering, NAN of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine
| | - R V Vovk
- V. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv, 61077, Ukraine
| | - V V Khotkevych
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, OX11 0DE, United Kingdom
| | - A Chroneos
- Department of Materials, Imperial College, London, SW7 2AZ, UK.
- Faculty of Engineering, Environment and Computing, Coventry University, Priory Street, Coventry, CV1 5FB, United Kingdom.
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Solovjov AL, Petrenko EV, Omelchenko LV, Vovk RV, Goulatis IL, Chroneos A. Effect of annealing on a pseudogap state in untwinned YBa 2Cu 3O 7-δ single crystals. Sci Rep 2019; 9:9274. [PMID: 31239510 PMCID: PMC6592912 DOI: 10.1038/s41598-019-45286-w] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 05/21/2019] [Indexed: 11/21/2022] Open
Abstract
The effect of annealing both in the oxygen atmosphere and at room temperatures on physical properties such as the pseudogap (Δ*(T)) and excess conductivity (σ'(T)) of untwined YBa2Cu3O7-δ (YBCO) single crystal with a small deviation from oxygen stoichiometry is studied. It was revealed that as the charge carrier density, nf, increases, Тс also slightly increases, whereas the temperature of the pseudogap opening, T*, decreases noticeably, which is consistent with the phase diagram (PD) of cuprates. The excess conductivity in the vicinity of Tc is represented by the Aslamazov-Larkin and Hikami-Larkin fluctuation theories, illustrating the three-dimensional to two-dimensional (i.e. 3D-2D) crossover with an increase in temperature. The crossover temperature T0 determines the coherence length along the c axis is ξc(0) = 0.86 Å, that is 2.6 times larger than for optimally doped YBCO single crystals with defects. Taking into account the short coherence length in high-temperature superconductors, in the model of free charge carriers the phase relaxation time of fluctuating Cooper pairs is determined, τφ (100 K) = (4.55 ± 0.4) · 10-13 s, which is slightly (1.2 times) larger than in well-structured YBCO films, and as in films, does not depend on nf. It is shown that Δ*(T) at different annealing stages practically does not change its shape. As in the well-structured YBCO films, Δ*(T) demonstrates maximum at Tpair~124 K which depends weakly on nf. However, the maximum value of Δ*(Tpair) increases with increasing nf, as it follows from the PD of cuprates. Comparing the experimental data with the Peters-Bauer theory we estimated the density of local pairs ≈ 0.3 near Tc that is a common value for high-temperature superconductors.
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Affiliation(s)
- A L Solovjov
- B. I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine, 47 Nauki ave., 61103, Kharkov, Ukraine
| | - E V Petrenko
- B. I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine, 47 Nauki ave., 61103, Kharkov, Ukraine
| | - L V Omelchenko
- B. I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine, 47 Nauki ave., 61103, Kharkov, Ukraine
| | - R V Vovk
- Physics Department, V. Karazin Kharkiv National University, Svobody Sq. 4, 61077, Kharkiv, Ukraine
| | - I L Goulatis
- Physics Department, V. Karazin Kharkiv National University, Svobody Sq. 4, 61077, Kharkiv, Ukraine
| | - A Chroneos
- Department of Materials, Imperial College, London, SW7 2AZ, UK.
- Faculty of Engineering, Environment and Computing, Coventry University, Priory Street, Coventry, CV1 5FB, United Kingdom.
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Tou H, Maniwa Y, Koiwasaki T, Yamanaka S. Unconventional superconductivity in electron-doped layered Li0.48(THF)yHfNCL. PHYSICAL REVIEW LETTERS 2001; 86:5775-5778. [PMID: 11415355 DOI: 10.1103/physrevlett.86.5775] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2000] [Indexed: 05/23/2023]
Abstract
We report magnetic susceptibility measurements on a layered superconductor Li0.48(THF)0.3HfNCl having Tc approximately 26 K. The present study revealed that (a) the Fermi level density of states is small, N*(EF) approximately 0.25 states/(eV spin f.u.), (b) mass enhancement is negligible, gamma; approximately 1, (c) electron-phonon coupling is weak, lambda(ep)<<1, (d) exchange enhancement is negligible, 1/(1+F(a)0) approximately 1, and (e) electronic density parameter is large, r(2D)s approximately 10.3 (i.e., low-carrier density). It is difficult to explain the origin of the high Tc in terms of the conventional phonon (BCS) mechanism of superconductivity.
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Affiliation(s)
- H Tou
- Department of Physics, Tokyo Metropolitan University, Minami-osawa, Hachi-oji, Tokyo 192-0397, Japan
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Ramallo MV, Pomar A, Vidal F. In-plane paraconductivity and fluctuation-induced magnetoconductivity in biperiodic layered superconductors: Application to YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4341-4356. [PMID: 9986341 DOI: 10.1103/physrevb.54.4341] [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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Kimura T, Miyasaka S, Takagi H, Tamasaku K, Eisaki H, Uchida S, Kitazawa K, Hiroi M, Sera M, Kobayashi N. In-plane and out-of-plane magnetoresistance in La2-xSrxCuO4 single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8733-8742. [PMID: 9982387 DOI: 10.1103/physrevb.53.8733] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hashimoto K, Nakao K, Kado H, Koshizuka N. c-axis negative magnetoresistance and fluctuation conductivity of Bi2Sr2CaCu2Ox single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:892-895. [PMID: 9983046 DOI: 10.1103/physrevb.53.892] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Holm W, Rapp Ö, Johnson CN, Helmersson U. Magnetoconductivity in YBa2Cu3O7- delta thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:3748-3755. [PMID: 9981503 DOI: 10.1103/physrevb.52.3748] [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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Amitin EB, Blinov AG, Boyarsky LA, Dikovsky VY, Zhdanov KR, Kameneva MY, Kochergin OM, Naumov VN, Frolova GI, Demianets LN, Makarenko IN, Shapiro AY, Uvarova TG. Transverse magnetoresistance of YBa2Cu3Ox single crystals with different oxygen content. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:15388-15392. [PMID: 9978497 DOI: 10.1103/physrevb.51.15388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lang W, Heine G, Kula W, Sobolewski R. Superconducting fluctuations in Bi2Sr2Ca2Cu3Ox thin films: Paraconductivity, excess Hall effect, and magnetoconductivity. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9180-9192. [PMID: 9977560 DOI: 10.1103/physrevb.51.9180] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pradhan AK, Roy SB, Chaddah P, Chen C, Wanklyn BM. Fluctuation phenomena in excess conductivity and magnetization of single-crystal Bi2Sr2CaCu2O8+y. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:7180-7183. [PMID: 9974683 DOI: 10.1103/physrevb.50.7180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Bhatia SN, Dhard CP. Excess conductivity and pair-breaking effects in YBa2Cu3O7 and Bi2Sr2Ca1-xYxCu2O8+ delta systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:12206-12215. [PMID: 10010096 DOI: 10.1103/physrevb.49.12206] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Lang W, Heine G, Schwab P, Wang XZ, Bäuerle D. Paraconductivity and excess Hall effect in epitaxial YBa2Cu3O7 films induced by superconducting fluctuations. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:4209-4217. [PMID: 10011319 DOI: 10.1103/physrevb.49.4209] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Carrington A, Walker DJ, Mackenzie AP, Cooper JR. Hall effect and resistivity of oxygen-deficient YBa2Cu3O7- delta thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:13051-13059. [PMID: 10007682 DOI: 10.1103/physrevb.48.13051] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Matsuda Y, Komiyama S, Onogi T, Terashima T, Shimura K, Bando Y. Thickness dependence of the Kosterlitz-Thouless transition in ultrathin YBa2Cu3O7- delta films. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:10498-10503. [PMID: 10007327 DOI: 10.1103/physrevb.48.10498] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Holm W, Andersson M, Rapp Ö, Kulikov MA, Makarenko IN. Anisotropic fluctuation magnetoconductivity in a YBa2Cu3O7- delta single crystal above Tc. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4227-4230. [PMID: 10008892 DOI: 10.1103/physrevb.48.4227] [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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Sugawara J, Iwasaki H, Kobayashi N, Yamane H, Hirai T. Fluctuation conductivity of a c-axis-oriented YBa2Cu3Oy film prepared by chemical vapor deposition. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14818-14822. [PMID: 10003580 DOI: 10.1103/physrevb.46.14818] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Matsuda Y, Komiyama S, Terashima T, Shimura K, Bando Y. Disappearance of Hall resistance in one-unit-cell-thick YBa2Cu3O7- delta : Evidence of free vortex-antivortex excitation. PHYSICAL REVIEW LETTERS 1992; 69:3228-3231. [PMID: 10046763 DOI: 10.1103/physrevlett.69.3228] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kim DH, Gray KE, Trochet MD. Scaling behavior of fluctuation conductivity of high-temperature superconductors in a magnetic field. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:10801-10804. [PMID: 10000992 DOI: 10.1103/physrevb.45.10801] [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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Reedyk M, Stager CV, Timusk T, Xue JS, Greedan JE. Magnetization measurements of single-crystal Pb2Sr2(Y,Ca)Cu3O8: Determination of the coherence length and upper critical field. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:10057-10061. [PMID: 10000894 DOI: 10.1103/physrevb.45.10057] [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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Matsuda Y, Fujiyama A, Komiyama S, Hikami S, Aronov AG, Terashima T, Bando Y. Superconducting fluctuation in the Hall conductivity: An estimation of skew-scattering lifetime in YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:4901-4906. [PMID: 10002129 DOI: 10.1103/physrevb.45.4901] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rice JP, Giapintzakis J, Ginsberg DM, Mochel JM. Hall effect above Tc in untwinned single-crystal YBa2Cu3O7-x: Normal-state behavior and superconducting fluctuations. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:10158-10166. [PMID: 9999020 DOI: 10.1103/physrevb.44.10158] [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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Fluctuation-enhanced conductivity and magnetoconductivity of high-quality YBa2Cu3O7?? crystals. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01357171] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Andersson M, Rapp Ö. Magnetoresistance measurements on polycrystalline YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:7722-7725. [PMID: 9998693 DOI: 10.1103/physrevb.44.7722] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Terashima T, Shimura K, Bando Y, Matsuda Y, Fujiyama A, Komiyama S. Superconductivity of one-unit-cell thick YBa2Cu3O7 thin film. PHYSICAL REVIEW LETTERS 1991; 67:1362-1365. [PMID: 10044126 DOI: 10.1103/physrevlett.67.1362] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bieri JB, Maki K, Thompson RS. Nonlocal effect in magnetoconductivity of high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:4709-4711. [PMID: 10000138 DOI: 10.1103/physrevb.44.4709] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Semba K, Ishii T, Matsuda A. Absence of the Zeeman effect on the Maki-Thompson fluctuation in magnetoresistance of YBa2Cu3O7 single crystals. PHYSICAL REVIEW LETTERS 1991; 67:769-772. [PMID: 10044984 DOI: 10.1103/physrevlett.67.769] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Suzuki M, Hikita M. Resistive transition, magnetoresistance, and anisotropy in La2-xSrxCuO4 single-crystal thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:249-261. [PMID: 9998242 DOI: 10.1103/physrevb.44.249] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kim DH, Gray KE, Kampwirth RT, McKay DM. Magnetoconductance of Tl2Ba2CaCu2Ox films in the fluctuation regime. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:2910-2915. [PMID: 9997591 DOI: 10.1103/physrevb.43.2910] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lichti RL, Cooke DW, Boekema C. Magnetic rare-earth contributions to muon relaxation rates and frequency shifts in RBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:1154-1157. [PMID: 9996311 DOI: 10.1103/physrevb.43.1154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Veira JA, Vidal F. Scattering of normal excitations by superconducting fluctuations in single-crystal and granular copper oxide superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:8748-8751. [PMID: 9995080 DOI: 10.1103/physrevb.42.8748] [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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Bieri JB, Maki K. Magnetoresistance of high-Tc superconductors in the fluctuation regime. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:4854-4856. [PMID: 9996039 DOI: 10.1103/physrevb.42.4854] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hikita M, Tajima Y, Tamamura T, Kurihara S. Weak localization, fluctuation, and superconductivity in thin Nb films and wires. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:118-126. [PMID: 9994517 DOI: 10.1103/physrevb.42.118] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Aronov AG, Hikami S. Skew-scattering effect on the Hall-conductance fluctuation in high-temperature superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:9548-9550. [PMID: 9993312 DOI: 10.1103/physrevb.41.9548] [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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Suzuki M, Hikita M. Anisotropic and thermally activated resistive behavior in Nd1.85Ce0.15CuO4- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:9566-9569. [PMID: 9993317 DOI: 10.1103/physrevb.41.9566] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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MacDonald AH. Edge states in the fractional-quantum-Hall-effect regime. PHYSICAL REVIEW LETTERS 1990; 64:220-223. [PMID: 10041680 DOI: 10.1103/physrevlett.64.220] [Citation(s) in RCA: 114] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Hikita M, Suzuki M. Fluctuation conductivity and normal resistivity in YBa2Cu3Oy. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:834-837. [PMID: 9992836 DOI: 10.1103/physrevb.41.834] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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