Nonlinear transport of the Wigner solid on superfluid 4He in a channel geometry.
Nonlinear transport of the Wigner solid on superfluid 4He in a channel geometry.
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DOI：
10.1103/physrevlett.102.046807
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发表时间：
2009-01
影响因子：
8.6
通讯作者：
H. Ikegami;H. Akimoto;K. Kono
中科院分区：
文献类型：
--
作者：
H. Ikegami;H. Akimoto;K. Kono
在宽度为8和15μm的通道中研究了漂浮在超流体4He上的电子晶体的非线性输运，其中电子速度和驱动电场是均匀的。在高激发下，我们观察到由于电子与底层表面变形的解耦而引起的速度跳跃。所获得的跳跃驱动场表明，由于表面波的布拉格-切伦科夫散射而导致动态加深的表面变形，从而发生了解耦。我们的结果还解释了 Glasson 等人报告的不寻常的非线性传输。 [物理。莱特牧师。 87, 176802 (2001)10.1103/PhysRevLett.87.176802]考虑电极几何形状。
Nonlinear transport of electron crystal floating on superfluid 4He is investigated in channels 8 and 15 mum in width, where the electron velocity and driving electric field are uniform. At a high excitation, we observe a jump in the velocity caused by the decoupling of the electrons from the underlying surface deformation. The obtained driving field at the jump indicates that the decoupling occurs from the dynamically deepened surface deformation as a result of the Bragg-Cherenkov scattering of surface waves. Our results also account for the unusual nonlinear transport reported by Glasson et al. [Phys. Rev. Lett. 87, 176802 (2001)10.1103/PhysRevLett.87.176802] considering the electrode geometry.