Browsing by Author "Konstantinov, D."

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Nonlinear transport of the inhomogeneous Wigner solid in a channel geometry
(2016-11-23)
Badrutdinov, A. O.
;
Smorodin, A. V.
;
Rees, D. G.
;
Lin, J. Y.
;
Konstantinov, D.
The transport properties of an electronic Wigner solid (WS) on the surface of superfluid helium-4 are investigated in a geometry that allows WS systems of significantly different sizes to be defined. We probe and compare transport phenomena attributed to the electronic order, such as Bragg-Cherenkov scattering and the WS sliding transition, in the cases of a long homogeneous WS, a small WS island, and a long inhomogeneous WS. We find no significant WS size effects on the transport properties, in contrast to predictions of theoretical works, which indicates an absence of long-range order in the WS systems under consideration. For the inhomogeneous WS, consisting of two distinct WSs connected in series, a complex interplay of individual WS transport properties is observed, as revealed in the observation of two separate Bragg-Cherenkov plateaus and WS sliding transitions. A simple model is proposed that provides a qualitative explanation of this behavior.
Unidirectional Charge Transport via Ripplonic Polarons in a Three-Terminal Microchannel Device
(2020-03-23)
Badrutdinov, A. O.
;
Rees, D. G.
;
Lin, J. Y.
;
Smorodin, A., V
;
Konstantinov, D.
We study the transport of surface electrons on superfluid helium through a microchannel structure in which the charge flow splits into two branches, one flowing straight and one turned at 90 degrees. According to Ohm's law, an equal number of charges should flow into each branch. However, when the electrons are dressed by surface excitations (ripplons) to form polaronlike particles with sufficiently large effective mass, all the charge follows the straight path due to momentum conservation. This surface-wave induced transport is analogous to the motion of electrons coupled to surface acoustic waves in semiconductor 2DEGs.