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

doi:10.1103/PhysRevB.49.8514

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

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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 language	English (US)
Pages (from-to)	8514-8517
Number of pages	4
Journal	Physical Review B
Volume	49
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.49.8514
State	Published - 1994
Externally published	Yes

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10.1103/PhysRevB.49.8514

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

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.",

author = "{J. Koester}, Steven and Bolognesi, {Colombo R.} and Hu, {Evelyn L.} and Herbert Kroemer and Rooks, {Michael J.}",

year = "1994",

doi = "10.1103/PhysRevB.49.8514",

language = "English (US)",

volume = "49",

pages = "8514--8517",

journal = "Physical Review B",

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T1 - Quantized conductance in an InAs/AlSb split-gate ballistic constriction with 1.0 m channel length

AU - J. Koester, Steven

AU - Bolognesi, Colombo R.

AU - Hu, Evelyn L.

AU - Kroemer, Herbert

AU - Rooks, Michael J.

PY - 1994

Y1 - 1994

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.49.8514

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JO - Physical Review B

JF - Physical Review B

IS - 12

ER -

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

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