Article ID Journal Published Year Pages File Type
1876715 Results in Physics 2015 4 Pages PDF
Abstract

We theoretically study the electronic structure and spin splitting of a strained GaAs(0 0 1) surface with broken twofold symmetry. We introduce a surface electron Hamiltonian of our model. By k·pk·p theory, we qualitatively evaluate the electronic structure of GaAs(0 0 1) surface, demonstrating that the spin degeneracy of the bottom of the surface-state conduction bands is split. Additionally, by the spin current operator, we evaluate the spin current of electrons in the bottom of the surface-state conduction bands, demonstrating that for n-type GaAs the spin current flows in the parallel direction to a mirror plane spontaneously. This is a new mechanism to generate the spin current.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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