Threshold behaviors of direct and Hall currents in topological spin-Hall effect
Threshold behaviors of direct and Hall currents in topological spin-Hall effect
复制标题
拓扑自旋霍尔效应中直流电流和霍尔电流的阈值行为
DOI:
10.1016/j.jmmm.2021.168492
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发表时间:
2022
影响因子:
2.7
通讯作者:
Dahnovsky, Yuri
中科院分区:
文献类型:
--
作者:
Zadorozhnyi, Andrei;Dahnovsky, Yuri
We study spin-dependent direct and Hall conductivities in the threshold region of Fermi energy, ɛ F= 2 J, where J is the exchange integral between the conduction electron spins and the skyrmion spin texture. For ɛ F at the threshold value and above the spin-down electrons are allowed to exist. We find the two in the direct and four narrow peaks in the Hall conductivities for Fermi energies slightly below the threshold value. The found effects are dramatic because the electric current changes by approximately eight times in the narrow range of gate voltages (∼ 4 meV). The values of the peaks strongly depend on skyrmion size. For small and very large skyrmion sizes the peak amplitudes are small compared to the conductivity absolute values. At the skyrmion radius a= 6 nm and very light conduction electrons, m∗∼ 1 0− 2 m e, the extrema are the most pronounced. The temperature evolution reveals the strong smearing effect where the peak-wise behavior completely disappears at room temperatures. Spin transistor could be considered for possible applications where in the narrow region of gate voltage the sharp conductivity change occurs.
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DOI:
10.1088/1361-648x/ab926c
发表时间:
2020
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
Zadorozhnyi, Andrei;Dahnovsky, Yuri
通讯作者:
Dahnovsky, Yuri
影响因子:
8.6
作者:
Machida, Y.;Nakatsuji, S.;Onoda, S.
通讯作者:
Onoda, S.
影响因子:
3.7
作者:
Andrei Zadorozhnyi;Y. Dahnovsky
通讯作者:
Andrei Zadorozhnyi;Y. Dahnovsky
影响因子:
3.7
作者:
Sergey S. Pershoguba;Sho Nakosai;and Alexander V. Balatsky
通讯作者:
and Alexander V. Balatsky
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Ohe;T. Ohtsuki;B. Kramer
通讯作者:
B. Kramer