arXiv subjects

Pengke Li

Publications and source records attributed to Pengke Li.

20 records · Page 2Linked to original sources

arXiv2011

Spin-Orbit Symmetries of Conduction Electrons in Silicon

We derive a spin-dependent Hamiltonian that captures the symmetry of the zone edge states in silicon. We present analytical expressions of the spin-dependent states and of spin relaxation due to electron-phonon interactions in the multivalley conduction band. We find excellent agreement with experimental results. Similar to the usage of the Kane Hamiltonian in direct band-gap semiconductors, the new Hamiltonian can be used to study spin properties of electrons in silicon.

cond-mat.mtrl-sci↗

arXiv2010

Theory of Spin-Dependent Phonon-Assisted Optical Transitions in Silicon

A theory for the relation between the spin polarization and luminescence in silicon is presented. The theory provides intuitive relations for phonon-assisted optical transitions between the conduction and valence band edges. It is shown that an opposite behavior of longitudinal and transverse optical phonon-assisted transitions is responsible to recent experimental results of spin injection into silicon. The effects of spin-orbit coupling and doping are studied in detail.

cond-mat.mtrl-sci↗