Aluminum arsenide cleaved-edge overgrown quantum wires

J. Moser; T. Zibold; D. Schuh; M. Bichler; F. Ertl; G. Abstreiter; M. Grayson; S. Roddaro; V. Pellegrini

doi:10.1063/1.1994955

Aluminum arsenide cleaved-edge overgrown quantum wires

J. Moser^*, T. Zibold, D. Schuh, M. Bichler, F. Ertl, G. Abstreiter, M. Grayson, S. Roddaro, V. Pellegrini

^*Corresponding author for this work

Electrical and Computer Engineering

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

11 Scopus citations

Abstract

We report conductance measurements in quantum wires made of aluminum arsenide, a heavy-mass, multivalley one-dimensional (1D) system. Zero-bias conductance steps are observed as the electron density in the wire is lowered, with additional steps observable upon applying a finite dc bias. We attribute these steps to depopulation of successive 1D subbands. The quantum conductance is substantially reduced with respect to the anticipated value for a spin- and valley-degenerate 1D system. This reduction is consistent with disorder-induced, intrawire backscattering that suppresses the transmission of 1D modes. Calculations are presented to demonstrate the role of strain in the 1D states of this cleaved-edge structure.

Original language	English (US)
Article number	052101
Journal	Applied Physics Letters
Volume	87
Issue number	5
DOIs	https://doi.org/10.1063/1.1994955
State	Published - 2005

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Aluminum arsenide cleaved-edge overgrown quantum wires",

abstract = "We report conductance measurements in quantum wires made of aluminum arsenide, a heavy-mass, multivalley one-dimensional (1D) system. Zero-bias conductance steps are observed as the electron density in the wire is lowered, with additional steps observable upon applying a finite dc bias. We attribute these steps to depopulation of successive 1D subbands. The quantum conductance is substantially reduced with respect to the anticipated value for a spin- and valley-degenerate 1D system. This reduction is consistent with disorder-induced, intrawire backscattering that suppresses the transmission of 1D modes. Calculations are presented to demonstrate the role of strain in the 1D states of this cleaved-edge structure.",

author = "J. Moser and T. Zibold and D. Schuh and M. Bichler and F. Ertl and G. Abstreiter and M. Grayson and S. Roddaro and V. Pellegrini",

note = "Funding Information: J.M. would like to thank Rosemarie Heilmann for technological advice and fabrication tricks. J.M. and M.G. gratefully acknowledge support from the COLLECT EC-Research Training Network, HPRN-CT-2002-00291, and the German Ministry of Education and Research BmBF Grant 01BM470. ",

year = "2005",

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journal = "Applied Physics Letters",

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T1 - Aluminum arsenide cleaved-edge overgrown quantum wires

AU - Moser, J.

AU - Zibold, T.

AU - Schuh, D.

AU - Bichler, M.

AU - Ertl, F.

AU - Abstreiter, G.

AU - Grayson, M.

AU - Roddaro, S.

AU - Pellegrini, V.

N1 - Funding Information: J.M. would like to thank Rosemarie Heilmann for technological advice and fabrication tricks. J.M. and M.G. gratefully acknowledge support from the COLLECT EC-Research Training Network, HPRN-CT-2002-00291, and the German Ministry of Education and Research BmBF Grant 01BM470.

PY - 2005

Y1 - 2005

N2 - We report conductance measurements in quantum wires made of aluminum arsenide, a heavy-mass, multivalley one-dimensional (1D) system. Zero-bias conductance steps are observed as the electron density in the wire is lowered, with additional steps observable upon applying a finite dc bias. We attribute these steps to depopulation of successive 1D subbands. The quantum conductance is substantially reduced with respect to the anticipated value for a spin- and valley-degenerate 1D system. This reduction is consistent with disorder-induced, intrawire backscattering that suppresses the transmission of 1D modes. Calculations are presented to demonstrate the role of strain in the 1D states of this cleaved-edge structure.

AB - We report conductance measurements in quantum wires made of aluminum arsenide, a heavy-mass, multivalley one-dimensional (1D) system. Zero-bias conductance steps are observed as the electron density in the wire is lowered, with additional steps observable upon applying a finite dc bias. We attribute these steps to depopulation of successive 1D subbands. The quantum conductance is substantially reduced with respect to the anticipated value for a spin- and valley-degenerate 1D system. This reduction is consistent with disorder-induced, intrawire backscattering that suppresses the transmission of 1D modes. Calculations are presented to demonstrate the role of strain in the 1D states of this cleaved-edge structure.

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DO - 10.1063/1.1994955

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