Boundary-mediated electron-electron interactions in quantum point contacts

V. T. Renard; O. A. Tkachenko; V. A. Tkachenko; T. Ota; N. Kumada; J. C. Portal; Y. Hirayama

doi:10.1103/PhysRevLett.100.186801

Boundary-mediated electron-electron interactions in quantum point contacts

V. T. Renard, O. A. Tkachenko, V. A. Tkachenko, T. Ota, N. Kumada, J. C. Portal, Y. Hirayama

Center for Science and Innovation in Spintronics (CSIS)

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

24 Citations (Scopus)

Abstract

An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.

Original language	English
Article number	186801
Journal	Physical review letters
Volume	100
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.100.186801
Publication status	Published - 2008 May 5

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.100.186801

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abstract = "An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.",

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AU - Renard, V. T.

AU - Tkachenko, O. A.

AU - Tkachenko, V. A.

AU - Ota, T.

AU - Kumada, N.

AU - Portal, J. C.

AU - Hirayama, Y.

PY - 2008/5/5

Y1 - 2008/5/5

N2 - An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.

AB - An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.

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Boundary-mediated electron-electron interactions in quantum point contacts

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