CAJ | 학술논문

研究与两个铁磁导体耦合的单个量子点中热梯度产生的纯自旋流。发现热梯度和电子库的铁磁性会在量子点能级离开电子-空穴对称点时产生较强的自旋压。自旋压的大小和方向可以通过改变热梯度的方向来调整。当两个铁磁引线的磁化方向为相互平行时,自旋压的绝对值最小,而当两个引线中的磁矩为反平行时,自旋压的强度会显著增大。
연구여량개철자도체우합적단개양자점중열제도산생적순자선류。발현열제도화전자고적철자성회재양자점능급리개전자-공혈대칭점시산생교강적자선압。자선압적대소화방향가이통과개변열제도적방향래조정。당량개철자인선적자화방향위상호평행시,자선압적절대치최소,이당량개인선중적자구위반평행시,자선압적강도회현저증대。
Spin voltage induced by temperature gradient in a quantum dot coupled to ferromagnetic leads is investigated.It is found that large spin bias is obtained when the quantum dot energy level is apart from the electron-hole symmetry point.Both the magnitude and the strength of the spin bias can be tuned by the direction of the temperature gradient.When the ferromagnetisms of the two leads are in parallel configuration,the magnitude of the spin bias is relatively small,while it become obviously large in the antiparallel case.