Structure of a single sharp quantum Hall edge probed by momentum-resolved tunneling

M. Huber; M. Grayson; M. Rother; W. Biberacher; W. Wegscheider; G. Abstreiter

doi:10.1103/PhysRevLett.94.016805

Structure of a single sharp quantum Hall edge probed by momentum-resolved tunneling

M. Huber^*, M. Grayson, M. Rother, W. Biberacher, W. Wegscheider, G. Abstreiter

^*Corresponding author for this work

Electrical and Computer Engineering

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

36 Scopus citations

Abstract

Momentum-resolved magnetotunneling spectroscopy is performed at a single sharp quantum Hall (QH) edge to probe the structure of integer QH edge modes. An epitaxially overgrown cleaved edge is shown to realize the sharp-edge limit with interchannel distances smaller than both the magnetic length and the Bohr radius where the Chklovskii soft-edge picture is no longer valid. The line shape of principal conductance peaks is explained, and an edge filling factor is determined from the peak position. A step in the dispersion is attributed to fluctuations in the QH ground energy.

Original language	English (US)
Article number	016805
Journal	Physical review letters
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.94.016805
State	Published - Jan 14 2005

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.94.016805

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abstract = "Momentum-resolved magnetotunneling spectroscopy is performed at a single sharp quantum Hall (QH) edge to probe the structure of integer QH edge modes. An epitaxially overgrown cleaved edge is shown to realize the sharp-edge limit with interchannel distances smaller than both the magnetic length and the Bohr radius where the Chklovskii soft-edge picture is no longer valid. The line shape of principal conductance peaks is explained, and an edge filling factor is determined from the peak position. A step in the dispersion is attributed to fluctuations in the QH ground energy.",

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AU - Grayson, M.

AU - Rother, M.

AU - Biberacher, W.

AU - Wegscheider, W.

AU - Abstreiter, G.

PY - 2005/1/14

Y1 - 2005/1/14

N2 - Momentum-resolved magnetotunneling spectroscopy is performed at a single sharp quantum Hall (QH) edge to probe the structure of integer QH edge modes. An epitaxially overgrown cleaved edge is shown to realize the sharp-edge limit with interchannel distances smaller than both the magnetic length and the Bohr radius where the Chklovskii soft-edge picture is no longer valid. The line shape of principal conductance peaks is explained, and an edge filling factor is determined from the peak position. A step in the dispersion is attributed to fluctuations in the QH ground energy.

AB - Momentum-resolved magnetotunneling spectroscopy is performed at a single sharp quantum Hall (QH) edge to probe the structure of integer QH edge modes. An epitaxially overgrown cleaved edge is shown to realize the sharp-edge limit with interchannel distances smaller than both the magnetic length and the Bohr radius where the Chklovskii soft-edge picture is no longer valid. The line shape of principal conductance peaks is explained, and an edge filling factor is determined from the peak position. A step in the dispersion is attributed to fluctuations in the QH ground energy.

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Structure of a single sharp quantum Hall edge probed by momentum-resolved tunneling

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