Quenching of the DOS beats in a two-dimensional electron gas in tilted magnetic fields

Details Quenching of the DOS beats in a two-dimensional electron gas in tilted magnetic fields Quenching of the DOS beats in a two-dimensional electron gas in tilted magnetic fields

2011-04-21

arxiv.org/abs/1104.4172v2

10.1016/j.ssc.2012.01.047

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 figures

Scientific paper

10.1016/j.ssc.2012.01.047

A two-dimensional electron gas exposed to a tilted magnetic field is considered with the Rashba spin-orbit interaction and the Zeeman effect. An exact solution for the eigenvalues were obtained assuming that two opposite spin states of adjacent Landau levels have equal probability. No crossings between adjacent eigenenergies were observed unlike in the perpendicular-magnetic-field case. The absence of crossings lead to quenched beating structures in the oscillations of the density of states (DOS). Persistent spin-splittings were observed at the weak magnetic field region. The splittings, however, can be effectively screened by an increased Landau level broadening. The results shed light on how spins can be controlled through the Rashba interaction strength, the disorder-related broadening and the magnetic field tilt angle.

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