Rössler, Ulrich and Kainz, Josef (2002) Microscopic interface asymmetry and spin splitting of electron subbands in semiconductor quantum structures. Solid State Communications 121 (6-7), pp. 313-316.
Download (69kB) - Repository staff only
The microscopic interface asymmetry of (001)-grown semiconductor heterostructures that gives rise to heavy-light hole coupling even at zero in-plane wave vector k||, modifies also the subband dispersion of confined electrons. Starting from a multiband envelope formulation we apply matrix perturbation theory to derive explicit expressions caused by this interface asymmetry, which in the 2×2 conduction band Hamiltonian appear as a warping and a spin-splitting term. The warping term results in an inequivalence of the dispersion along  and [1-10] as required by the microscopic C2v symmetry, while the spin-splitting term has the same structure as the corresponding term derived from the zinc-blende bulk inversion asymmetry. Implications with respect to spin-relaxation will be discussed.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler|
|Projects:||Forschergruppe Ferromagnet-Halbleiter Nanostrukturen|
|Keywords:||A. Heterojunctions; A. Semiconductors; A. Quantum wells; D. Electronic band structure; D. Spin dynamics; Interface asymmetry; Spin-splitting; Electron subband; Warping; Bulk inversion asymmetry; Spin relaxation|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:55|