SIM-RUC
Surface & Interface Modeling
for Emerging Nanomaterials and Devices

Conditions for quantized anisotropic magnetoresistance

Chen Hu,1 Jiao Teng,1,* Guanghua Yu,1 Wengang Lu,2,† and Wei Ji3

1Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China 2Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 3Department of Physics, Renmin University of China, Beijing 100872, China

DOI:10.1103/PhysRevB.91.045438    Publication Date: 30 January 2015


Abstract:

Conditions for the appearance of quantized anisotropic magnetoresistance (QAMR) in ferromagnetic conductors have been investigated from the viewpoint of the transmission channels calculated by method of the nonequilibrium Green’s function–density functional theory. We demonstrate that the spin-orbital interaction is a precondition and the transverse size is a crucial condition for QAMR to emerge. Furthermore, we show the evolution of QAMR from a stepwise shape (corresponding to small transverse sizes) to a classical smooth cosine shape (corresponding to large transverse sizes). In addition, we prove the strong temperature dependence of QAMR, so a low temperature is necessary. Our research reconciles the different experiments and enlightens experimenters on QAMR.


Keywords:


View: Phys. Rev. B  91, 045438 (2015)     Local Copy

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