J. Phys. III France
Volume 7, Numéro 7, July 1997
Page(s) 1515 - 1520
DOI: 10.1051/jp3:1997204
J. Phys. III France 7 (1997) 1515-1520

Aharonov-Bohm Interference of Holes at Dislocations in Lattice-Mismatched Heterostructures

T. Figielski, T. Wosinski and A. Makosa

Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

(Received 30 October 1996, accepted 27 January 1997)

We have succeeded in revealing Ahaxonov-Bohm type interference of holes in macroscopic semiconductor sample containing an array of straight-line dislocations. This interference has been observed at helium temperatures as oscillations in the forward current flowing through p +-n junction of the lattice-mismatched GaAs 1-xSb x/GaAs heterostructure while measured as a function of the magnetic field perpendicular to the current. The oscillation cycles arise when a primary hole wave meeting the Read's cylinder of a misfit dislocation interferes with a wave which circled completely round the cylinder.

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