School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
J Phys Condens Matter. 2012 Mar 21;24(11):115702. doi: 10.1088/0953-8984/24/11/115702. Epub 2012 Feb 21.
The interlayer magnetotransport of a model layered metal is calculated semiclassically. Each layer contains parallel quasi-1D wires but the orientation of wires within each layer is perpendicular to the orientation of wires in adjacent layers. The model has a highly anisotropic amplitude for interlayer electron transfer and is used to illustrate simply the effects that this anisotropy has on the magnetotransport. Strong positive magnetoresistance is calculated for magnetic fields parallel to the current, with the size of magnetoresistance varying inversely with the interlayer hopping amplitude. For fields perpendicular to the current, the magnetoresistance depends qualitatively on the orientation of the field: it scales linearly with the field strength B when the field points toward intersections of 1D Fermi surfaces belonging to individual layers, and scales as √B when the field points between intersections. In a weak field, the resistance is maximum when the field is orientated parallel to the current and minimum when it is perpendicular to the current. Magnetoresistance oscillations are also studied. The implications for more general models of multilayer metals are discussed.
模型层状金属的层间磁输运被半经典地计算。每层包含平行的准一维线，但每层内的线的方向垂直于相邻层内的线的方向。该模型对于层间电子转移具有高度各向异性的幅度，用于简单说明这种各向异性对磁输运的影响。计算得到了与电流平行的磁场的强正磁电阻，磁电阻的大小与层间跳跃幅度成反比。对于垂直于电流的磁场，磁电阻定性地取决于磁场的方向：当磁场指向属于各个层的一维费米面的交点时，它与磁场强度 B 呈线性关系，当磁场指向交点之间时，它与 √B 呈线性关系。在弱磁场中，当磁场平行于电流时电阻最大，垂直于电流时电阻最小。还研究了磁电阻的振荡。讨论了对多层金属更一般模型的影响。
