IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Spin-orbit effects in nanowire-based wurtzite semiconductor quantum dots
Autor/es:
G. A. INTRONATI; P. I. TAMBORENEA; D. WEINMANN; R. A. JALABERT
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Año: 2013 vol. 88 p. 45303 - 45313
ISSN:
0163-1829
Resumen:
We study the effect of the Dresselhaus spin-orbit interaction on the
electronic states and spin relaxation rates of cylindrical quantum dots
defined on quantum wires having wurtzite lattice structure. The linear
and cubic contributions of the bulk Dresselhaus spin-orbit coupling
(SOC) are taken into account, along with the influence of a weak
external magnetic field. The previously found analytic solution for the
electronic states of cylindrical quantum dots with zinc blende lattice
structures with Rashba interaction is extended to the case of quantum
dots with wurtzite lattices. For the electronic states in InAs dots, we
determine the spin texture and the effective g factor, which
shows a scaling collapse when plotted as a function of an effective
renormalized dot-size-dependent spin-orbit coupling strength. The
acoustic-phonon-induced spin relaxation rate is calculated and the
transverse piezoelectric potential is shown to be the dominant one.