Yin Haitao, Li Zhongqiu, Feng Lifeng, Xue Huijie, Li Hua, Liu Xiaojie
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, P. R. China.
Departments of Physics, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, P. R. China.
J Nanosci Nanotechnol. 2018 Mar 1;18(3):2096-2099. doi: 10.1166/jnn.2018.14260.
A quantum dot coupled to two electrodes with spin-dependent splitting of chemical potentials (spin bias) is proposed as a detector of an individual electron spin. Spin polarized transport properties through the quantum dot have been investigated theoretically by means of the nonequilibrium Green's function formalism. We found that the direction of current flow is dependent on the electronic spin state in quantum dot. Measuring the direction of the current flow through the devices, we can determine the direction of the electronic spin state in quantum dot. This proposed detector provides a practical and all electrical approach to detect the electronic spin state in quantum dot structure.
提出了一种耦合到两个电极且具有化学势自旋相关分裂（自旋偏置）的量子点作为单个电子自旋的探测器。通过非平衡格林函数形式理论研究了通过量子点的自旋极化输运性质。我们发现电流方向取决于量子点中的电子自旋态。通过测量流经器件的电流方向，我们可以确定量子点中电子自旋态的方向。这种提出的探测器提供了一种实用的全电学方法来检测量子点结构中的电子自旋态。
