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Salvato M, Ottaviani I, Lucci M, Cirillo M, Di Castro D, Innocenti D, Tebano A, Balestrino G. Superconducting anisotropy in (CaCuO2)n/(SrTiO3)m superlattices. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:335702. [PMID: 23883741 DOI: 10.1088/0953-8984/25/33/335702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The superconducting properties of (CaCuO2)n/(SrTiO3)m artificial superlattices have been investigated via transport measurements under the application of external magnetic fields. The coherence lengths in the plane of the substrate and in the direction perpendicular to it (ξab and ξc, respectively) have been measured while varying m, the thickness of the SrTiO3 block. The results show that with increasing m, i.e. with increasing structural anisotropy, the superconducting anisotropy γ = ξab/ξc decreases. This apparent anomalous relation between the structural and the superconducting anisotropies suggests that γ is more affected by local doping at the interface rather than by the separation between the superconducting blocks. This interpretation of the experimental results has been confirmed by both the irreversibility lines and the magnetic field dependence of the activation energy for fluxon motion.
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Affiliation(s)
- M Salvato
- Dipartimento di Fisica and MINAS LAB, Università di Roma Tor Vergata, I-00133 Roma, Italy. CNR-SPIN, Italy
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Baily SA, Maiorov B, Zhou H, Balakirev FF, Jaime M, Foltyn SR, Civale L. Smectic vortex phase in optimally doped YBa2Cu3O7 thin films. PHYSICAL REVIEW LETTERS 2008; 100:027004. [PMID: 18232912 DOI: 10.1103/physrevlett.100.027004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2007] [Indexed: 05/25/2023]
Abstract
Angular dependent resistivity measurements of optimally doped YBa2Cu3O7 films in fields H pulsed to 50 T are presented. Up to the highest H, the vortex melting field Hm increases and vortex motion is reduced for H aligned with the correlated pinning centers along the main crystalline axes, otherwise 3D anisotropic scaling describes the vortex dynamics. For H parallel ab, the rapid increase in Hm at low temperatures and a critical exponent analysis near Hm confirm the presence of the liquid-crystalline smectic phase predicted for layered superconductors.
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Affiliation(s)
- S A Baily
- Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA.
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Gordeev SN, Zhukov AA, Jansen AG, Gagnon R, Taillefer L. Oscillatory melting temperature of the vortex smectic phase in layered superconductors. PHYSICAL REVIEW LETTERS 2000; 85:4594-4597. [PMID: 11082604 DOI: 10.1103/physrevlett.85.4594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2000] [Indexed: 05/23/2023]
Abstract
We report on transport measurements of YBa 2Cu 3O (7-delta) single crystals with different oxygen contents in the geometry B, J ||ab (J perpendicularB). Our data show that the vortices become confined between the Cu-O planes below a well-defined temperature at which the effective size 2xi of the vortex core is approximately equal to the period of the Cu-O layers. This confinement strongly increases the vortex liquid freezing temperature. A new melting line is found separating a vortex liquid and a smectic phase, which shows an oscillatory field dependence reflecting differences between commensurate and incommensurate smectic states.
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Affiliation(s)
- SN Gordeev
- Department of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, United Kingdom
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Hu X, Tachiki M. Hu and tachiki reply:. PHYSICAL REVIEW LETTERS 2000; 85:2652. [PMID: 10978135 DOI: 10.1103/physrevlett.85.2652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2000] [Indexed: 05/23/2023]
Affiliation(s)
- X Hu
- National Research Institute for Metals Sengen 1-2-1, Tsukuba 305-0047, Japan
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Hu X, Tachiki M. Possible tricritical point in phase diagrams of interlayer josephson-vortex systems in high- T(c) superconductors. PHYSICAL REVIEW LETTERS 2000; 85:2577-2580. [PMID: 10978111 DOI: 10.1103/physrevlett.85.2577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2000] [Indexed: 05/23/2023]
Abstract
A critical value in the product of the anisotropy parameter and the magnetic field is observed in interlayer Josephson-vortex systems by extensive Monte Carlo simulations. Below (above) this critical value the thermodynamic phase transition between the normal and the superconducting states upon temperature sweeping is first (second) order. It is discussed that the origin of this tricritical point is the highly anisotropic layered structure of high- T(c) superconductors.
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Affiliation(s)
- X Hu
- National Research Institute for Metals, Tsukuba 305-0047, Japan
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Olsson P, Holme P. Comment on "Structure and phase transition of josephson vortices in anisotropic high- T(c) superconductors". PHYSICAL REVIEW LETTERS 2000; 85:2651. [PMID: 10978134 DOI: 10.1103/physrevlett.85.2651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2000] [Indexed: 05/23/2023]
Affiliation(s)
- P Olsson
- Department of Theoretical Physics Umea University 901 87 Umea, Sweden
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Doyle RA, Seow WS, Yan Y, Campbell AM, Mochiku T, Kadowaki K, Wirth G. Local Electrodynamics in Heavy Ion Irradiated Bi2Sr2CaCu 2O8+ delta. PHYSICAL REVIEW LETTERS 1996; 77:1155-1158. [PMID: 10063004 DOI: 10.1103/physrevlett.77.1155] [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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Morozov N, Zeldov E, Majer D, Konczykowski M. Paramagnetic ac susceptibility at the first-order vortex-lattice phase transition. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R3784-R3787. [PMID: 9986372 DOI: 10.1103/physrevb.54.r3784] [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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Welp U, Fendrich JA, Kwok WK, Crabtree GW, Veal BW. Thermodynamic evidence for a flux line lattice melting transition in YBa2 Cu3O7- delta. PHYSICAL REVIEW LETTERS 1996; 76:4809-4812. [PMID: 10061386 DOI: 10.1103/physrevlett.76.4809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Balents L, Radzihovsky L. Continuous 3D freezing transition in layered superconductors. PHYSICAL REVIEW LETTERS 1996; 76:3416-3419. [PMID: 10060961 DOI: 10.1103/physrevlett.76.3416] [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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Mun MO, Lee SI, Lee WC, Canfield PC, Cho BK, Johnston DC. Vortex glass and lattice melting transitions in a YNi2B2C single crystal. PHYSICAL REVIEW LETTERS 1996; 76:2790-2793. [PMID: 10060789 DOI: 10.1103/physrevlett.76.2790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Nishizaki T, Onodera Y, Kobayashi N, Asaoka H, Takei H. Magnetization jump and the vortex-lattice melting transition in YBa2Cu3Oy. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:82-85. [PMID: 9981947 DOI: 10.1103/physrevb.53.82] [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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Domínguez D, Gronbech-Jensen N, Bishop AR. Resistive hysteresis and nonlinear I-V characteristics at the first-order melting of the Abrikosov vortex lattice. PHYSICAL REVIEW LETTERS 1995; 75:4670-4673. [PMID: 10059968 DOI: 10.1103/physrevlett.75.4670] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Balents L, Nelson DR. Quantum smectic and supersolid order in helium films and vortex arrays. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:12951-12968. [PMID: 9980467 DOI: 10.1103/physrevb.52.12951] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zech D, Lee SL, Keller H, Blatter G, Janossy B, Kes PH, Li TW, Menovsky AA. Correlation of flux lines in single-crystal Bi2Sr2CaCu2O8 with columnar defects. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6913-6919. [PMID: 9981921 DOI: 10.1103/physrevb.52.6913] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Safar H, Gammel PL, Huse DA, Alers GB, Bishop DJ, Lee WC, Giapintzakis J, Ginsberg DM. Vortex dynamics below the flux-lattice melting transition in YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6211-6214. [PMID: 9981846 DOI: 10.1103/physrevb.52.6211] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chen T, Teitel S. Superconducting Coherence in a Vortex Line Liquid: Simulations with Finite lambda. PHYSICAL REVIEW LETTERS 1995; 74:2792-2795. [PMID: 10058019 DOI: 10.1103/physrevlett.74.2792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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de Andrade R. Melting line with quantum correction in a melt-textured YBa2Cu3O7- delta sample. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9383-9386. [PMID: 9977594 DOI: 10.1103/physrevb.51.9383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fendrich JA, Kwok WK, Giapintzakis J, Vinokur VM, Fleshler S, Welp U, Viswanathan HK, Crabtree GW. Vortex liquid state in an electron irradiated untwinned YBa2Cu3O7- delta crystal. PHYSICAL REVIEW LETTERS 1995; 74:1210-1213. [PMID: 10058962 DOI: 10.1103/physrevlett.74.1210] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wagner P, Frey U, Hillmer F, Adrian H. Evidence for a vortex-liquid-vortex-glass transition in epitaxial Bi2Sr2Ca2Cu3O10+ delta thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1206-1212. [PMID: 9978275 DOI: 10.1103/physrevb.51.1206] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Song YS, Hirabayashi M, Ihara H, Tokumoto M. Anisotropy of the irreversibility lines for c-axis-aligned HgBa2Ca2Cu3O8+ delta powders. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:16644-16648. [PMID: 9976053 DOI: 10.1103/physrevb.50.16644] [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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Mansky PA, Chaikin PM, Haddon RC. Evidence for Josephson vortices in (BEDT-TTF)2Cu(NCS)2. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:15929-15944. [PMID: 9975961 DOI: 10.1103/physrevb.50.15929] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Balents L, Nelson DR. Fluctuations and intrinsic pinning in layered superconductors. PHYSICAL REVIEW LETTERS 1994; 73:2618-2621. [PMID: 10057106 DOI: 10.1103/physrevlett.73.2618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ziese M, Esquinazi P, Gupta A, Braun HF. Disorder-induced transition of the vortex lattice in YBa2Cu3O7 crystals and films. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:9491-9498. [PMID: 9975002 DOI: 10.1103/physrevb.50.9491] [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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