Rayda Gammag, Cristine Villagonzalo
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.
View original:
http://arxiv.org/abs/1104.4172
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