Quantum dynamical study of electron transport in 2D nanostructure under external field

摘要

By using quantum dynamics, we investigate an electron transport in a two-dimensional (2D) quantum structure under applied external fields. The structure is defined as a double tunnel junction which consists of ferromagnetic regions and insulator regions. The one-electron wave function computed by numerical diagonalization determines the time evolution of the electron diffusion in the nanodevice. From the dynamical analysis of the electron motion, we find there exist some particular eigenstates in which the electron diffusion velocity has larger value under the weak magnetic field.