Unidirectional Charge Transport via Ripplonic Polarons in a Three-Terminal Microchannel Device
Unidirectional Charge Transport via Ripplonic Polarons in a Three-Terminal Microchannel Device
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DOI：
10.1103/physrevlett.124.126803
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发表时间：
2020-03-23
影响因子：
8.6
通讯作者：
Konstantinov, D.
中科院分区：
文献类型：
--
作者：
Badrutdinov, A. O.;Rees, D. G.;Konstantinov, D.
我们研究了超流氦表面电子通过微通道结构的传输，其中电荷流分成两个分支，一个笔直流动，另一个以 90 度转向。根据欧姆定律，流入每个分支的电荷数量应相等。然而，当电子通过表面激发（波纹）形成具有足够大有效质量的类极化子粒子时，由于动量守恒，所有电荷都遵循直线路径。这种表面波诱导的传输类似于半导体 2DEG 中与表面声波耦合的电子运动。
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.