Hostname: page-component-6bf8c574d5-vmclg Total loading time: 0 Render date: 2025-02-22T08:18:34.522Z Has data issue: false hasContentIssue false
  • English
  • Français

Spin-orbit coupling and magnetic spin states in cylindrical quantum dots

Published online by Cambridge University Press:  15 March 2011

C. F. Destefani ,
Sergio E. Ulloa  and
G. E. Marques
C. F. Destefani
Affiliation:
Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701-2979 Departamento de Física, Universidade Federal de São Carlos, 13565-905, São Carlos, São Paulo, Brazil
Sergio E. Ulloa
Affiliation:
Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701-2979
G. E. Marques
Affiliation:
Departamento de Física, Universidade Federal de São Carlos, 13565-905, São Carlos, São Paulo, Brazil
Get access

Extract

We make a detailed analysis of each possible spin-orbit coupling of zincblende narrow-gap cylindrical quantum dots built in a two-dimensional electron gas. These couplings are related to both bulk (Dresselhaus) and structure (Rashba) inversion asymmetries. We study the competition between electron-electron and spin-orbit interactions on electronic properties of 2-electron quantum dots.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 825: Symposium G – Semiconductor Spintronics , 2004 , G4.6
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Datta, S., and Das, B., Appl. Phys. Lett. 56, 665 (1990).Google Scholar
2 Bychkov, Y.A., and Rashba, E.I., J. Phys. C 17, 6039 (1984).Google Scholar
3 Loss, D., and DiVincenzo, D.P., Phys. Rev. A 57,120 (1998); X.Hu, and S.Das Sarma, Phys.Rev. A 64, 042312 (2001).Google Scholar
4 Dresselhaus, G., Phys. Rev. 100, 580 (1955).Google Scholar
5 Jacak, L., Wojs, A., and Hawrylak, P., Quantum Dots (Springer, Berlin, 1998).Google Scholar
6 Destefani, C.F., Ulloa, S.E., and Marques, G.E., Phys. Rev. B 69, 125302 (2004); C.F. Destefani, Ph.D. Thesis at Universidade Federal de São Carlos, São Paulo, Brazil, unpublished.Google Scholar
7 InSb parameters: m = 0.014 m0, g = −51, ε = 16.5, aB = 625 Å, α = 500 Å2, γ = 160 eVÅ3. Dot characteristics: ћω0 = 15 meV (l0 = 190 Å), z0 = 40 Å, dV/dz = −0.5 meV/Å. Prefactors (meV) at zero B-field: = αћω0/= 0.2, ER = −(α/λ)dV/dz = 1.3, = γ/λ3 = 0.02, = γ/λ = 5.2, and Eee = αћλ/αβ= 4.5.Google Scholar
8 Darnhofer, T., and Rössler, U., Phys. Rev. B 47, 16020 (1993).Google Scholar