Transport properties of Bi2Sr2CaCu2O8 crystals with and without surface barriers

被引:43
作者
Fuchs, DT [1 ]
Doyle, RA
Zeldov, E
Rycroft, SFWR
Tamegai, T
Ooi, S
Rappaport, ML
Myasoedov, Y
机构
[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel
[2] Univ Cambridge, Interdisciplinary Res Ctr Superconduct, Cambridge CB3 0HE, England
[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 113, Japan
[4] Weizmann Inst Sci, IL-76100 Rehovot, Israel
关键词
D O I
10.1103/PhysRevLett.81.3944
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Bi2Sr2CaCu2O8 crystals with electrical contacts positioned far from the edges are studied by transport measurements, then cut into narrow strip geometry, and remeasured. Instead of showing larger resistance, the strips display a dramatic drop in the resistance, enhanced activation energy, and nonlinear behavior due to strong surface barriers. The surface barriers also dominate the resistive drop at the first-order phase transition. Because the surface barriers are avoided in large crystals, we are able to probe the solid phase and find good agreement with the recent predictions of Bragg glass theory. [S0031-9007(98)07485-7].
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收藏
页码:3944 / 3947
页数:4
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