Transport Properties of a Nonequilibrium Quantum Dot Connected to Ferromagnetic Leads

Transport Properties of a Nonequilibrium Quantum Dot Connected to Ferromagnetic Leads
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连接到铁磁引线的非平衡量子点的输运特性

DOI:
10.1007/s10773-016-3227-0
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发表时间:
2017-03
影响因子:
1.4
通讯作者:
Zhang Yongmei
Zhang Yongmei
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhang Yongmei

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研究了铁磁导线连接的非平衡量子点的传输共振和电导性质。热电性能也进行了研究。使用紧束缚形式主义和数值求解薛定谔方程,自旋相关的传输得到并绘制为入射电子能量的函数。自旋向上和自旋向下的电子的传输随着电压偏置和倾斜角的改变以不同的方式改变。电流的自旋极化可以通过调节偏压来灵敏地调谐。这些研究指出了通过调制倾斜角或偏压来获得自旋相关的透射率、自旋极化电流和有效Seebeck系数的可能方法。
In this paper, transmission resonance and conductance properties of nonequilibrium quantum dot connected by ferromagnetic leads are investigated. Thermoelectric properties are also studied. Using the tight-binding formalism and numerically solving the Schrodinger equation, spin-dependent transmissions are obtained and plotted as a function of incoming electron energy. Transmissions of spin up and spin down electrons change in different ways as voltage bias and tilt angle change. Current spin polarization can be sensitively tuned by adjusting voltage bias. These research indicates the possible methods to modulate tilt angle or the bias voltage to obtain spin-dependent transmission, spin polarized current and effective Seebeck coefficients.
反对称磁场下 HgTe/CdTe 量子阱中的自旋极化边缘模式和蛇态
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