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

D. G. Rees I. Kuroda C.A. Marrache-Kikuchi 1 M. Höfer P. Leiderer K. Kono
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : 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 splitgate 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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Submitted on : Thursday, February 16, 2012 - 12:13:56 PM
Last modification on : Wednesday, September 16, 2020 - 5:40:32 PM

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D. G. Rees, I. Kuroda, C.A. Marrache-Kikuchi, M. Höfer, P. Leiderer, et al.. Transport Measurements of Strongly Correlated Electrons on Helium in a Classical Point-Contact Device. Journal of Low Temperature Physics, Springer Verlag (Germany), 2011, 166, pp.107-124. ⟨10.1007/s10909-011-0416-3⟩. ⟨in2p3-00670604⟩



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