Giant out-of-plane magnetoresistance in Bi-Sr-Ca-Cu-O: A new dissipation mechanism in copper-oxide superconductors?
Giant out-of-plane magnetoresistance in Bi-Sr-Ca-Cu-O: A new dissipation mechanism in copper-oxide superconductors?
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DOI：
10.1103/physrevlett.66.2164
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发表时间：
1991-04
影响因子：
8.6
通讯作者：
G. Briceno;M. Crommie;A. Zettl
中科院分区：
文献类型：
--
作者：
G. Briceno;M. Crommie;A. Zettl
We have measured the anisotropic magnetoresistivity tensor of single-crystal Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} in the normal and in the mixed state. For magnetic fields applied perpendicular to the Cu-O ({ital a}-{ital b}) planes, the out-of-plane ({ital c}-axis) resistivity displays a huge magnetic enhancement, and a large apparent depression in the resistively measured transition temperature {ital T}{sub {ital c}} ({ital c} axis). No such depression is observed in {ital T}{sub {ital c}}({ital a}-{ital b} plane). Although these results suggest a field-induced anisotropy in {ital T}{sub {ital c}}, we propose an alternate model of novel Lorentz-force-independent fluctuation-induced dissipation in the mixed state. The model may also account for the anomalous anisotropic magnetoresistance observed in layered low-{ital T}{sub {ital c}} superconductors.
We have measured the anisotropic magnetoresistivity tensor of single-crystal Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} in the normal and in the mixed state. For magnetic fields applied perpendicular to the Cu-O ({ital a}-{ital b}) planes, the out-of-plane ({ital c}-axis) resistivity displays a huge magnetic enhancement, and a large apparent depression in the resistively measured transition temperature {ital T}{sub {ital c}} ({ital c} axis). No such depression is observed in {ital T}{sub {ital c}}({ital a}-{ital b} plane). Although these results suggest a field-induced anisotropy in {ital T}{sub {ital c}}, we propose an alternate model of novel Lorentz-force-independent fluctuation-induced dissipation in the mixed state. The model may also account for the anomalous anisotropic magnetoresistance observed in layered low-{ital T}{sub {ital c}} superconductors.