Quantized conductance in an InAs/AlSb split-gate ballistic constriction with 1.0 m channel length

Steven J. Koester, Colombo R. Bolognesi, Evelyn L. Hu, Herbert Kroemer, Michael J. Rooks

Research output: Contribution to journalArticle

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Abstract

Quantized conductance is observed in an InAs/AlSb ballistic constriction with channel length of 1.0 m, at 4.2 K. In this structure eight conductance steps are detected, all within 20% of their theoretical values for purely ballistic transport. Compared to a shorter constriction (L=0.20 m) located on the same mesa, relatively little degradation of the quantization is observed for the longer device. Possible reasons for the enhanced length performance of InAs/AlSb constrictions compared to similar structures fabricated in GaAs/AlxGa1-xAs heterostructures are discussed.

Original languageEnglish (US)
Pages (from-to)8514-8517
Number of pages4
JournalPhysical Review B
Volume49
Issue number12
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

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