Forward scattering probe of edge-state coupling in the quantum Hall regime

Yeong Ah Soh; Yeong Ah Soh; Frank M. Zimmermann; Harold G. Craighead

doi:10.1103/PhysRevB.64.153303

Forward scattering probe of edge-state coupling in the quantum Hall regime

Yeong Ah Soh, Yeong Ah Soh, Frank M. Zimmermann, Harold G. Craighead

Houston Methodist

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

3 Scopus citations

Abstract

We report on magnetoconductance measurements of a submicrometer-wide constriction in a two-dimensional electron gas with a tunable central gate. For negative central gate biases, an edge channel loop forms around the central-gate potential hump and couples to reflected edge channels, opening a forward scattering pathway. From the conductance contribution of this pathway we deduce that the transmission probability for tunneling between adjacent edge channels of different Landau levels is 0.5, corresponding to the strong-coupling limit, for a coupling region of only a few hundred nanometers in length.

Original language	English (US)
Article number	153303
Pages (from-to)	1533031-1533034
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.64.153303
State	Published - Oct 15 2001

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.64.153303

Cite this

@article{b8a54d978c2c4b298cb33a6bdc0e14f2,

title = "Forward scattering probe of edge-state coupling in the quantum Hall regime",

abstract = "We report on magnetoconductance measurements of a submicrometer-wide constriction in a two-dimensional electron gas with a tunable central gate. For negative central gate biases, an edge channel loop forms around the central-gate potential hump and couples to reflected edge channels, opening a forward scattering pathway. From the conductance contribution of this pathway we deduce that the transmission probability for tunneling between adjacent edge channels of different Landau levels is 0.5, corresponding to the strong-coupling limit, for a coupling region of only a few hundred nanometers in length.",

author = "Soh, {Yeong Ah} and Soh, {Yeong Ah} and Zimmermann, {Frank M.} and Craighead, {Harold G.}",

year = "2001",

month = oct,

day = "15",

doi = "10.1103/PhysRevB.64.153303",

language = "English (US)",

volume = "64",

pages = "1533031--1533034",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "0163-1829",

publisher = "American Institute of Physics",

number = "15",

}

TY - JOUR

T1 - Forward scattering probe of edge-state coupling in the quantum Hall regime

AU - Soh, Yeong Ah

AU - Zimmermann, Frank M.

AU - Craighead, Harold G.

PY - 2001/10/15

Y1 - 2001/10/15

N2 - We report on magnetoconductance measurements of a submicrometer-wide constriction in a two-dimensional electron gas with a tunable central gate. For negative central gate biases, an edge channel loop forms around the central-gate potential hump and couples to reflected edge channels, opening a forward scattering pathway. From the conductance contribution of this pathway we deduce that the transmission probability for tunneling between adjacent edge channels of different Landau levels is 0.5, corresponding to the strong-coupling limit, for a coupling region of only a few hundred nanometers in length.

AB - We report on magnetoconductance measurements of a submicrometer-wide constriction in a two-dimensional electron gas with a tunable central gate. For negative central gate biases, an edge channel loop forms around the central-gate potential hump and couples to reflected edge channels, opening a forward scattering pathway. From the conductance contribution of this pathway we deduce that the transmission probability for tunneling between adjacent edge channels of different Landau levels is 0.5, corresponding to the strong-coupling limit, for a coupling region of only a few hundred nanometers in length.

UR - http://www.scopus.com/inward/record.url?scp=0035887480&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035887480&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.64.153303

DO - 10.1103/PhysRevB.64.153303

M3 - Article

AN - SCOPUS:0035887480

SN - 0163-1829

VL - 64

SP - 1533031

EP - 1533034

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 15

M1 - 153303

ER -

Forward scattering probe of edge-state coupling in the quantum Hall regime

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this