REFLECTION OF BALLISTIC ELECTRONS BY DIFFUSIVE 2-DIMENSIONAL CONTACTS

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Abstract

We report quenching of high-magnetic-field Shubnikov-de Haas oscillations and shrinking of the Hall plateaux with decreasing temperature in a quantum Hall effect conductor with low-mobility contact leads. Selective He-ion bombardment has been employed to reduce the mobility of a two-dimensional electron gas in the contacts. We explain the results in terms of the Milne reflection of the electrons from these disordered regions. At sufficiently low temperatures, inelastic scattering is suppressed and electrons are scattered back by elastic collisions before thermalisation can occur.
Original languageEnglish
JournalSolid-State Electronics
Volume37
Issue number4-6
Pages (from-to)1005-1009
ISSN0038-1101
Publication statusPublished - 1994
Externally publishedYes
EventInternational Conference on Modulated Semiconductor Structures - GARMISCH PARTENKIR, GERMANY
Duration: 1 Jan 1993 → …
Conference number: 6th

Conference

ConferenceInternational Conference on Modulated Semiconductor Structures
Number6th
CityGARMISCH PARTENKIR, GERMANY
Period01/01/1993 → …

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