Handle URI:
http://hdl.handle.net/10754/598557
Title:
Imaging of Coulomb-Driven Quantum Hall Edge States
Authors:
Lai, Keji; Kundhikanjana, Worasom; Kelly, Michael A.; Shen, Zhi-Xun; Shabani, Javad; Shayegan, Mansour
Abstract:
The edges of a two-dimensional electron gas (2DEG) in the quantum Hall effect (QHE) regime are divided into alternating metallic and insulating strips, with their widths determined by the energy gaps of the QHE states and the electrostatic Coulomb interaction. Local probing of these submicrometer features, however, is challenging due to the buried 2DEG structures. Using a newly developed microwave impedance microscope, we demonstrate the real-space conductivity mapping of the edge and bulk states. The sizes, positions, and field dependence of the edge strips around the sample perimeter agree quantitatively with the self-consistent electrostatic picture. The evolution of microwave images as a function of magnetic fields provides rich microscopic information around the ν=2 QHE state. © 2011 American Physical Society.
Citation:
Lai K, Kundhikanjana W, Kelly MA, Shen Z-X, Shabani J, et al. (2011) Imaging of Coulomb-Driven Quantum Hall Edge States. Physical Review Letters 107. Available: http://dx.doi.org/10.1103/PhysRevLett.107.176809.
Publisher:
American Physical Society (APS)
Journal:
Physical Review Letters
KAUST Grant Number:
KUS-F1-033-02
Issue Date:
Oct-2011
DOI:
10.1103/PhysRevLett.107.176809
PubMed ID:
22107561
Type:
Article
ISSN:
0031-9007; 1079-7114
Sponsors:
We would like to thank Steve A. Kivelson, Shoucheng Zhang, David Goldhaber-Gordon, and Bertrand I. Halperin for the helpful discussion. The work is supported by NSF grants DMR-0906027 and Center of Probing the Nanoscale PHY-0425897; DOE-DE-FG03-01ER45929-A001 for the equipment; NSF grants ECCS-1001719, DMR-1033046, and DOE-DE-FG02-00-ER45841 for the 2DEG materials; and King Abdullah University of Science and Technology Fellowship (KUS-F1-033-02).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLai, Kejien
dc.contributor.authorKundhikanjana, Worasomen
dc.contributor.authorKelly, Michael A.en
dc.contributor.authorShen, Zhi-Xunen
dc.contributor.authorShabani, Javaden
dc.contributor.authorShayegan, Mansouren
dc.date.accessioned2016-02-25T13:32:07Zen
dc.date.available2016-02-25T13:32:07Zen
dc.date.issued2011-10en
dc.identifier.citationLai K, Kundhikanjana W, Kelly MA, Shen Z-X, Shabani J, et al. (2011) Imaging of Coulomb-Driven Quantum Hall Edge States. Physical Review Letters 107. Available: http://dx.doi.org/10.1103/PhysRevLett.107.176809.en
dc.identifier.issn0031-9007en
dc.identifier.issn1079-7114en
dc.identifier.pmid22107561en
dc.identifier.doi10.1103/PhysRevLett.107.176809en
dc.identifier.urihttp://hdl.handle.net/10754/598557en
dc.description.abstractThe edges of a two-dimensional electron gas (2DEG) in the quantum Hall effect (QHE) regime are divided into alternating metallic and insulating strips, with their widths determined by the energy gaps of the QHE states and the electrostatic Coulomb interaction. Local probing of these submicrometer features, however, is challenging due to the buried 2DEG structures. Using a newly developed microwave impedance microscope, we demonstrate the real-space conductivity mapping of the edge and bulk states. The sizes, positions, and field dependence of the edge strips around the sample perimeter agree quantitatively with the self-consistent electrostatic picture. The evolution of microwave images as a function of magnetic fields provides rich microscopic information around the ν=2 QHE state. © 2011 American Physical Society.en
dc.description.sponsorshipWe would like to thank Steve A. Kivelson, Shoucheng Zhang, David Goldhaber-Gordon, and Bertrand I. Halperin for the helpful discussion. The work is supported by NSF grants DMR-0906027 and Center of Probing the Nanoscale PHY-0425897; DOE-DE-FG03-01ER45929-A001 for the equipment; NSF grants ECCS-1001719, DMR-1033046, and DOE-DE-FG02-00-ER45841 for the 2DEG materials; and King Abdullah University of Science and Technology Fellowship (KUS-F1-033-02).en
dc.publisherAmerican Physical Society (APS)en
dc.titleImaging of Coulomb-Driven Quantum Hall Edge Statesen
dc.typeArticleen
dc.identifier.journalPhysical Review Lettersen
dc.contributor.institutionGeballe Laboratory for Advanced Materials, Stanford, United Statesen
dc.contributor.institutionPrinceton University, Princeton, United Statesen
kaust.grant.numberKUS-F1-033-02en

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