Smet, J and Fleischmann, R and Weiss, Dieter and Ketzmerick, R and Blick, R and Lütjering, G and Klitzing, K and Geisel, T and Weimann, G (1996) Evidence for quasi-classical transport of composite fermions in an inhomogeneous effective magnetic field. Semiconductor Science andTechnology 11, p. 1482.
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We report on transverse magnetic focusing experiments in arrays of equidistant constrictions with centre-to-centre constriction spacings L varying from 500 nm to in the vicinity of the Landau level filling factor of a two-dimensional electron system. Provided the composite fermion mean free path is comparable to L, focusing is observed for both effective magnetic field directions. The non-uniform electron distribution with a saddle point in the middle of each constriction, and the associated inhomogeneous effective magnetic field for the composite fermions, invokes characteristic differences in the composite fermion focusing spectra compared with the electron focusing spectra near zero magnetic field. These changes are well predicted by quasi-classical calculations of the composite fermion dynamics in the corresponding potential landscape.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 13:20|
|Last Modified:||05 Aug 2009 13:57|