Temperature dependence of the side-jump spin Hall conductivity

Temperature dependence of the side-jump spin Hall conductivity
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侧跳自旋霍尔电导率的温度依赖性

DOI:
10.1103/physrevb.100.085425
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发表时间:
2018-11
期刊:
影响因子:
3.7
通讯作者:
Qian Niu
Qian Niu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Cong Xiao;Yi Liu;Zhe Yuan;Shengyuan A.Yang;Qian Niu

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在自旋霍尔效应的传统范例中,由于电子-声子散射引起的侧跳电导率被认为与温度无关。相反,我们得出的区别是,虽然这种侧跳电导率是温度无关的在经典的均分制度的纵向电阻率是线性的温度,它是温度依赖于均分制度以下。导致这种温度依赖性的机制不同于我们所熟悉的纵向电阻率。在Pt的具体例子中,我们表明自旋霍尔电导率随温度的变化可以高达50%。实验上可获得的高纯度Pt被认为适合于在80 K以下观察这种显著的变化。
In the conventional paradigm of the spin Hall effect, the side-jump conductivity due to electron-phonon scattering is regarded to be temperature independent. To the contrary, we draw the distinction that, while this side-jump conductivity is temperature independent in the classical equipartition regime where the longitudinal resistivity is linear in temperature, it is temperature dependent below the equipartition regime. The mechanism resulting in this temperature dependence differs from the familiar one of the longitudinal resistivity. In the concrete example of Pt, we show that the change of the spin Hall conductivity with temperature can be as high as 50%. Experimentally accessible high-purity Pt is proposed to be suitable for observing this prominent variation below 80 K.
DOI: 10.1103/physrevb.77.165117
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