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Transport Measurements of Strongly Correlated Electrons on Helium in a Classical Point-Contact Device

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2012

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Rees, David G.
Kuroda, Isao
Marrache-Kikuchi, Claire A.
Kono, Kimitoshi

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https://doi.org/10.1007/s10909-011-0416-3
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Journal of Low Temperature Physics. Springer. 2012, 166(3-4), pp. 107-124. ISSN 0022-2291. eISSN 1573-7357. Available under: doi: 10.1007/s10909-011-0416-3

Zusammenfassung

We present transport measurements of electrons on the surface of liquid helium in a microchannel device in which a constriction may be formed by a split-gate electrode. The surface electron current passing through the microchannel first decreases and is then completely suppressed as the split-gate voltage is swept negative. The current decreases in a steplike manner, due to changes in the number of electrons able to pass simultaneously through the constriction. We investigate the dependence of the electron transport on the AC driving voltage and the DC potentials applied to the sample electrodes, in order to understand the electrostatic potential profile of the constriction region. Our results are in good agreement with a finite element modeling analysis of the device. We demonstrate that the threshold of current flow depends not only on the applied potentials but also on the surface electron density. The detailed understanding of the characteristics of such a device is an important step in the development of mesoscopic experiments with surface electrons on liquid helium.

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ISO 690REES, David G., Isao KURODA, Claire A. MARRACHE-KIKUCHI, Moritz HÖFER, Paul LEIDERER, Kimitoshi KONO, 2012. Transport Measurements of Strongly Correlated Electrons on Helium in a Classical Point-Contact Device. In: Journal of Low Temperature Physics. Springer. 2012, 166(3-4), pp. 107-124. ISSN 0022-2291. eISSN 1573-7357. Available under: doi: 10.1007/s10909-011-0416-3
BibTex
@article{Rees2012-02Trans-48602,
  year={2012},
  doi={10.1007/s10909-011-0416-3},
  title={Transport Measurements of Strongly Correlated Electrons on Helium in a Classical Point-Contact Device},
  number={3-4},
  volume={166},
  issn={0022-2291},
  journal={Journal of Low Temperature Physics},
  pages={107--124},
  author={Rees, David G. and Kuroda, Isao and Marrache-Kikuchi, Claire A. and Höfer, Moritz and Leiderer, Paul and Kono, Kimitoshi}
}
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    <dcterms:abstract xml:lang="eng">We present transport measurements of electrons on the surface of liquid helium in a microchannel device in which a constriction may be formed by a split-gate electrode. The surface electron current passing through the microchannel first decreases and is then completely suppressed as the split-gate voltage is swept negative. The current decreases in a steplike manner, due to changes in the number of electrons able to pass simultaneously through the constriction. We investigate the dependence of the electron transport on the AC driving voltage and the DC potentials applied to the sample electrodes, in order to understand the electrostatic potential profile of the constriction region. Our results are in good agreement with a finite element modeling analysis of the device. We demonstrate that the threshold of current flow depends not only on the applied potentials but also on the surface electron density. The detailed understanding of the characteristics of such a device is an important step in the development of mesoscopic experiments with surface electrons on liquid helium.</dcterms:abstract>
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