Pseudospin-electric coupling for holes beyond the envelope-function approximation
ORAL
Abstract
We have calculated [1] the electric-dipole (pseudospin-electric) coupling between heavy and light holes in GaAs from first principles. We find a transition dipole of 0.5 debye, a significant fraction of that for the hydrogen-atom 1sā2p transition. In addition, we derive the Dresselhaus spin-orbit coupling that is generated by this transition dipole for heavy holes in a triangular quantum well. A quantitative microscopic description of this pseudospin-electric coupling may be important for understanding the origin of spin splitting in quantum wells, spin coherence/relaxation (T2*/T1) times, spin-electric coupling for cavity-QED, electric-dipole spin resonance, and spin non-conserving tunneling in double quantum dot systems. Related results for the first-principles calculation of hyperfine couplings [2] for holes in GaAs, silicon, and germanium will also be discussed.
[1] P. Philippopoulos, S. Chesi, D. Culcer, and W. A. Coish, Phys. Rev. B 102, 075310 (2020).
[2] P. Philippopoulos, S. Chesi, W. A. Coish, Phys. Rev. B 101, 115302 (2020).
[1] P. Philippopoulos, S. Chesi, D. Culcer, and W. A. Coish, Phys. Rev. B 102, 075310 (2020).
[2] P. Philippopoulos, S. Chesi, W. A. Coish, Phys. Rev. B 101, 115302 (2020).
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Presenters
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Bill Coish
Department of Physics, McGill University, Physics, McGill University, Montreal, Canada, Physics, McGill University
Authors
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Bill Coish
Department of Physics, McGill University, Physics, McGill University, Montreal, Canada, Physics, McGill University
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Pericles Philippopoulos
NanoAcademic Technologies
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Stefano Chesi
Beijing Computational Science Research Center
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Dimitrie Culcer
School of Physics, University of New South Wales