Superconducting fluctuations and the Nernst effect in high-Tc superconductors

被引：9
|
作者：
Chen, Y-J [1 ]
Lin, P. J. [2 ]
Wu, K. H. [1 ]
Rosenstein, B. [1 ]
Luo, C. W. [1 ]
Juang, J. Y. [1 ]
Lin, J-Y [3 ]
机构：
[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 300, Taiwan
[2] Universal Analyt Inc, Res Dept, Airdrie, AB, Canada
[3] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2013年 / 26卷 / 10期
关键词：
FERMI-SURFACE; STRIPE ORDER; PSEUDOGAP; TRANSPORT; PHASE; FIELD;
D O I：
10.1088/0953-2048/26/10/105029
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The comprehensive rho(T) measurements and the consequent resistivity curvature mapping (RCM) on Y0.7Ca0.3Ba2Cu3O7-delta thin films (doping levels p = 0.08-0.21) elucidate a phase diagram for the whole doping range. This phase diagram further strengthens a view that the 'normal' phase in hole-doped cuprates should be divided into a strong superconducting (SC) fluctuation phase and the 'real' normal phase in which there is no significant influence of SC. The temperature of superconducting fluctuations T-f as a function of p was calculated using the Ginzburg-Landau model for layered superconductors. Comparisons between T-f and the Nernst temperature establish the origin of the Nernst effect as SC fluctuations. Some of the details in rho(T) cannot be fully understood by the existing models and call for a more sophisticated theory of carrier dynamics in cuprates.
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页数：7
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