论文标题
与倾斜的零散电子的异常自旋传输特性
Anomalous Spin Transport Properties of Gapped Dirac Electrons with Tilting
论文作者
论文摘要
研究间隙狄拉克电子的异常旋转传输系数已应用于准二维有机导体$α$ - （BETS）$ _ 2 $ i $ _3 $。在存在自旋轨道相互作用引起的间隙的情况下，我们表明有效的哈密顿量与凯恩（Kane）和梅尔（Mele）所考虑的模型相似，并额外倾斜。使用这种有效的哈密顿量，使用微观线性响应理论或Kubo公式在分析中获得了直达磁场线性阶的电导率。结果表明，与磁场成正比的自旋霍尔电导率和异常的对角线自旋电导率在该系统中无为无零，这些系统是根据浆果曲率和轨道磁矩编写的。使用典型参数的自旋导率的估计值估计的估计值与PT中的自旋霍尔电导率相当。
The anomalous spin transport coefficients of gapped Dirac electrons are studied with application to a quasi-two-dimensional organic conductor $α$-(BETS)$_2$I$_3$ in mind. In the presence of a gap induced by spin-orbit interaction, we show that the effective Hamiltonian is similar to the model considered by Kane and Mele with additional tilting. With this effective Hamiltonian, conductivity tensors up to the linear order of the applied magnetic field are obtained analytically using the microscopic linear response theory or Kubo formula. It is shown that spin Hall conductivity and anomalous diagonal spin conductivity proportional to the magnetic field become nonzero in this system, which are written in terms of the Berry curvature and orbital magnetic moment.The estimated values of spin conductivities using typical parameters turn out to be comparable to the spin Hall conductivity in Pt.
