Investigation of the super-efficient Rashba effect by simulation of Shubnikov-de Haas oscillations in a two-dimensional hole gas
2006 (English)In: Physica. E, Low-Dimensional systems and nanostructures, ISSN 1386-9477, E-ISSN 1873-1759, Vol. 34, no 02-jan, 377-380 p.Article in journal (Refereed) Published
The Shubnikov-de Haas effect is frequently used for two-dimensional systems to determine individual subband populations, e.g. when the subbands are split by the Rashba effect. We have previously shown that the Rashba effect can give a wave vector splitting for holes that is up to three orders of magnitude larger than for electrons at the same electric field. To reach the optimum we have made a careful design of a modulation-doped quantum well with a top gate in which the negative differential Rashba effect is utilized. From the calculated hole Landau levels we determine the density of states at the Fermi energy and demonstrate a clear difference between the symmetric case without bias and the asymmetric case with a gate voltage of 100 meV, where the spin subband populations differ by a factor 3.
Place, publisher, year, edition, pages
2006. Vol. 34, no 02-jan, 377-380 p.
splitting, Rashba effect, holes, quantum well, inversion asymmetry, electric-field, quantum-wells, spin, microstructures, approximation, systems
IdentifiersURN: urn:nbn:se:kth:diva-15930DOI: 10.1016/j.physe.2006.03.093ISI: 000239903200095ScopusID: 2-s2.0-33746394110OAI: oai:DiVA.org:kth-15930DiVA: diva2:333972
QC 20100525 QC 20110927. Conference: 16th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-16). Albuquerque, NM. JUL 10-15, 2005 2010-08-052010-08-052012-03-20Bibliographically approved