Langenbuch, Michael and Hennig, Ralf and Suhrke, Michael and Rössler, Ulrich and Albrecht, C. and Smet, J. and Weiss, Dieter (2000) Minibands, magnetic breakdown, and novel magnetoresistance oscillations in short-period lateral superlattices. Physica E 6 (1-4), pp. 565-568.
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Novel 1/B periodic low-field oscillations observed in the magnetoresistance of short-period lateral superlattices with weak electrostatic modulation are analyzed as being due to the formation of minibands. The energy gaps caused by the weak superlattice potential distort the Fermi circle of the unmodulated two-dimensional electron system (2DES) at the Brillouin-zone boundaries and form smaller closed Fermi contours giving rise to the novel oscillations. We discuss the periodicity of these novel oscillations for one-dimensional (1D) and two-dimensional (2D) lateral modulation and compare their dependence on the electron density with the well-known classical commensurability oscillations.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler
|Projects:||Forschergruppe Ferromagnet-Halbleiter Nanostrukturen|
|Keywords:||Miniband; Superlattice; Magnetoresistance oscillation|
|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|