Spin relaxation and decoherence of holes in quantum dots

Details Spin relaxation and decoherence of holes in quantum dots Spin relaxation and decoherence of holes in quantum dots

2005-03-08

arxiv.org/abs/cond-mat/0503181v1

Phys. Rev. Lett. 95, 076805 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.95.076805

We investigate heavy-hole spin relaxation and decoherence in quantum dots in perpendicular magnetic fields. We show that at low temperatures the spin decoherence time is two times longer than the spin relaxation time. We find that the spin relaxation time for heavy holes can be comparable to or even longer than that for electrons in strongly two-dimensional quantum dots. We discuss the difference in the magnetic-field dependence of the spin relaxation rate due to Rashba or Dresselhaus spin-orbit coupling for systems with positive (i.e., GaAs quantum dots) or negative (i.e., InAs quantum dots) $g$-factor.

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