Quantum states and optics in a {\it p}-type heterojunction with lateral surface quantum dot or antidot superlattice subjected to perpendicular magnetic field

Details Quantum states and optics in a {\it p}-type heterojunction with lateral surface quantum dot or antidot superlattice subjected to perpendicular magnetic field Quantum states and optics in a {\it p}-type heterojunction with lateral surface quantum dot or antidot superlattice subjected to perpendicular magnetic field

2002-11-26

arxiv.org/abs/cond-mat/0211582v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 6 figures; to appear in Physical Review B in January 2003

Scientific paper

10.1103/PhysRevB.67.035321

The studies of quantum states and optics in a {\it p}-type heterojunction with lateral surface quantum dot (antidot) superlattice and in the presence of perpendicular magnetic field are performed. For the first time the Azbel'-- Hofstadter problem is solved for holes in a complicated valence band described by the $4 \times 4$ Luttinger Hamiltonian. The set of magnetic subbands is obtained for separate hole levels in a wide interval of magnetic field. We found remarkable differences between hole spectra and the Hofstadter "butterfly" for electrons. The influence of the spin-orbit interaction onto wavefunctions and energy spectrum has been investigated. The probabilities of optical transitions between quantum states in the valence band and donors located in the monolayer inside the heterojunction are calculated. The set of parameters (superlattice periods, amplitude of periodic potential, magnitude of magnetic field, etc.) required for experimental observation of splitted hole Landau levels is determined.

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