Anisotropic magnetotransport in Dirac-Weyl magnetic junctions
Anisotropic magnetotransport in Dirac-Weyl magnetic junctions
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DOI：
10.1103/physrevb.95.085308
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发表时间：
2016-11
影响因子：
3.7
通讯作者：
Yuya Ominato;Koji Kobayashi;K. Nomura
中科院分区：
文献类型：
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作者：
Yuya Ominato;Koji Kobayashi;K. Nomura
我们从理论上研究了掺杂铁磁性Weyl半金属夹在掺杂Dirac半金属之间的Dirac-Weyl磁性结中的各向异性磁输运。我们用Landauer公式计算了电导，发现系统表现出非常大的各向异性磁阻(AMR)。AMR取决于费米能量与交换相互作用强度的比值。AMR的起源是Weyl半金属中费米面的移动，其机制与传统的AMR完全不同，它源于自旋相关的散射和自旋-轨道相互作用。
We theoretically study the anisotropic magnetotransport in Dirac-Weyl magnetic junctions where a doped ferromagnetic Weyl semimetal is sandwiched between doped Dirac semimetals. We calculate the conductance using the Landauer formula and find that the system exhibits extraordinarily large anisotropic magnetoresistance (AMR). The AMR depends on the ratio of the Fermi energy to the strength of the exchange interaction. The origin of the AMR is the shift of the Fermi surface in the Weyl semimetal, and the mechanism is completely different from the conventional AMR originating from the spin dependent scattering and the spin-orbit interaction.