Quantum Interference above 4.2 K in a GaAl0.3As0.7/GaAs Aharonov-Bohm Ring View Full Text


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Article Info

DATE

2000-03

AUTHORS

S. Pedersen, A. E. Hansen, A. Kristensen, C. B. Sørensen, P. E. Lindelof

ABSTRACT

Magneto-conductance measurements of a micron sized GaAI0.3As0.7/GaAs Aharonov–Bohm devicehas been performed at temperatures above T=4.2 K, inthe regime where only a few transverse modes are occupied. Wefind that the Aharonov–Bohm oscillations are still visible atthese relatively high temperatures. The electron density ofthe Aharonov–Bohm device was during the measurementscontrolled via a gate voltage applied to a small stub whichwas attached to one arm of the ring. Due to this highlyasymmetric gate configuration the electron density in the ringis strongly asymmetric, and hence an oscillating conductanceas a function of gate voltage is expected—in analogy withthe Mach–Zender interferometer. More... »

PAGES

457-465

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1004610521373

DOI

http://dx.doi.org/10.1023/a:1004610521373

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1011664065


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