Temperature dependence of the resistivity tensor in superconducting Bi2Sr2.2Ca0.8Cu2O8 crystals.
Temperature dependence of the resistivity tensor in superconducting Bi2Sr2.2Ca0.8Cu2O8 crystals.
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DOI：
10.1103/physrevlett.60.2194
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发表时间：
1988-05
影响因子：
8.6
通讯作者：
S. Martin;A. Fiory;R. Fleming;L. Schneemeyer;J. Waszczak
中科院分区：
文献类型：
--
作者：
S. Martin;A. Fiory;R. Fleming;L. Schneemeyer;J. Waszczak
在新的高温超导体Bi/sub 2/Sr/sub 2.2/Ca/sub 0.8/Cu/sub 2/O/sub 8/晶体中，测量了T/sub c/ = 81 ~ 600 K范围内的强各向异性电阻率张量。a-B平面各向异性为rho/sub a/rho/sub B/approx。=2，其中rho/sub a/和rho/sub B/在T中呈线性。垂直分量rho/sub c/约为10。cap omega.. cm比rho/sub a/或rho/sub B/大10/sup 5/。非金属温度依赖性的证据被发现的ρ/分C/ρ/分AB/电阻率比。这些数据与平面间准粒子隧穿的概念是一致的，但也提出了另一种由拓扑缺陷引起的弱面间耦合的解释
A strongly anisotropic resistivity tensor was measured from T/sub c/ = 81 to 600 K in crystals of the new high-T/sub c/ superconductor Bi/sub 2/Sr/sub 2.2/Ca/sub 0.8/Cu/sub 2/O/sub 8/. The a-b plane anisotropy is rho/sub a/rho/sub b/approx. =2, with rho/sub a/ and rho/sub b/ linear in T. The perpendicular component rho/sub c/approx.10 ..cap omega.. cm is 10/sup 5/ greater than rho/sub a/ or rho/sub b/. Evidence for nonmetallic temperature dependence is found for the rho/sub c/rho/sub ab/ resistivity ratio. The data are consistent with the notion of quasiparticle tunneling between planes, but an alternative explanation in terms of weak interplanar coupling by topological defects is also presented