Observation of collective and single-particle effects in conductance oscillations in a ‘quantum donut’

Scott Yang; A. S. Adourian; M. J. Berry; R. M. Westervelt; A. C. Gossard; K. L. Campman

doi:10.1016/S0749-6036(09)80005-0

Observation of collective and single-particle effects in conductance oscillations in a ‘quantum donut’

Scott Yang, A. S. Adourian, M. J. Berry, R. M. Westervelt, A. C. Gossard, K. L. Campman

Research output: Contribution to journal › Article › peer-review

Abstract

A ‘quantum donut’ device with quantum point contacts and an independently tunable center gate was fabricated in a GaAs/Al_0.3Ga_0.7As heterostructure. The low temperature magnetoconductance in the tunneling regime shows two sets of oscillations at high magnetic fields: one corresponds to the area enclosed by the outer diameter, associated with Aharonov-Bohm-like edge state interference, and one corresponds to the area of the annulus, associated with oscillations in the self-consistent electron distribution due to Landau level depopulations.

Original language	English (US)
Pages (from-to)	235-238
Number of pages	4
Journal	Superlattices and Microstructures
Volume	16
Issue number	3
DOIs	https://doi.org/10.1016/S0749-6036(09)80005-0
State	Published - 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0749-6036(09)80005-0

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title = "Observation of collective and single-particle effects in conductance oscillations in a {\textquoteleft}quantum donut{\textquoteright}",

abstract = "A {\textquoteleft}quantum donut{\textquoteright} device with quantum point contacts and an independently tunable center gate was fabricated in a GaAs/Al0.3Ga0.7As heterostructure. The low temperature magnetoconductance in the tunneling regime shows two sets of oscillations at high magnetic fields: one corresponds to the area enclosed by the outer diameter, associated with Aharonov-Bohm-like edge state interference, and one corresponds to the area of the annulus, associated with oscillations in the self-consistent electron distribution due to Landau level depopulations.",

author = "Scott Yang and Adourian, {A. S.} and Berry, {M. J.} and Westervelt, {R. M.} and Gossard, {A. C.} and Campman, {K. L.}",

year = "1994",

doi = "10.1016/S0749-6036(09)80005-0",

language = "English (US)",

volume = "16",

pages = "235--238",

journal = "Superlattices and Microstructures",

issn = "0749-6036",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - Observation of collective and single-particle effects in conductance oscillations in a ‘quantum donut’

AU - Yang, Scott

AU - Adourian, A. S.

AU - Berry, M. J.

AU - Westervelt, R. M.

AU - Gossard, A. C.

AU - Campman, K. L.

PY - 1994

Y1 - 1994

N2 - A ‘quantum donut’ device with quantum point contacts and an independently tunable center gate was fabricated in a GaAs/Al0.3Ga0.7As heterostructure. The low temperature magnetoconductance in the tunneling regime shows two sets of oscillations at high magnetic fields: one corresponds to the area enclosed by the outer diameter, associated with Aharonov-Bohm-like edge state interference, and one corresponds to the area of the annulus, associated with oscillations in the self-consistent electron distribution due to Landau level depopulations.

AB - A ‘quantum donut’ device with quantum point contacts and an independently tunable center gate was fabricated in a GaAs/Al0.3Ga0.7As heterostructure. The low temperature magnetoconductance in the tunneling regime shows two sets of oscillations at high magnetic fields: one corresponds to the area enclosed by the outer diameter, associated with Aharonov-Bohm-like edge state interference, and one corresponds to the area of the annulus, associated with oscillations in the self-consistent electron distribution due to Landau level depopulations.

UR - http://www.scopus.com/inward/record.url?scp=0028740454&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028740454&partnerID=8YFLogxK

U2 - 10.1016/S0749-6036(09)80005-0

DO - 10.1016/S0749-6036(09)80005-0

M3 - Article

AN - SCOPUS:0028740454

SN - 0749-6036

VL - 16

SP - 235

EP - 238

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

IS - 3

ER -

Observation of collective and single-particle effects in conductance oscillations in a ‘quantum donut’

Abstract

All Science Journal Classification (ASJC) codes

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