Extremely large magnetoresistance in the nonmagnetic metal PdCoO2.
Extremely large magnetoresistance in the nonmagnetic metal PdCoO2.
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DOI：
10.1103/physrevlett.111.056601
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发表时间：
2013-07
影响因子：
8.6
通讯作者：
H. Takatsu;J. Ishikawa;S. Yonezawa;H. Yoshino;T. Shishidou;T. Oguchi;K. Murata;Y. Maeno
中科院分区：
文献类型：
--
作者：
H. Takatsu;J. Ishikawa;S. Yonezawa;H. Yoshino;T. Shishidou;T. Oguchi;K. Murata;Y. Maeno
在非磁性层状金属PdCoO(2)中实现了极大的磁电阻。尽管具有高度导电的金属行为，具有简单的准二维六方费米面，但沿[11][Over]0]方向的磁场的层间电阻高达35,000%。此外，对于该场方向，电阻的温度依赖关系变为非金属的，而对于沿[110]方向的场，它仍然是金属的。简单费米面上的磁场对层间相干性的严重各向异性破坏可归因于洛伦兹力驱动载流子在费米面上的轨道运动，但到目前为止似乎在很大程度上被忽视了。
Extremely large magnetoresistance is realized in the nonmagnetic layered metal PdCoO(2). In spite of a highly conducting metallic behavior with a simple quasi-two-dimensional hexagonal Fermi surface, the interlayer resistance reaches up to 35,000% for the field along the [11[over ¯]0] direction. Furthermore, the temperature dependence of the resistance becomes nonmetallic for this field direction, while it remains metallic for fields along the [110] direction. Such severe and anisotropic destruction of the interlayer coherence by a magnetic field on a simple Fermi surface is ascribable to orbital motion of carriers on the Fermi surface driven by the Lorentz force, but seems to have been largely overlooked until now.