作为非牛顿流体的二维电子气体

IF 0.6 4区物理与天体物理 Q4 PHYSICS, APPLIED

Low Temperature Physics Pub Date : 2023-12-13 DOI:10.1063/10.0022366

Serhii Kryhin, Leonid Levitov

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引用次数: 0

摘要

二维电子系统提供了一个有吸引力的平台来探索由于费米表面的相空间约束导致的共线载流子散射而产生的长寿命激发。最近发现，这些效应可以提高朗道费米-液体理论设定的基本边界上的激发寿命，其因子为(TF/T)α， α≈2。长寿命自由度具有放大对弱扰动的响应的能力，从而产生持久的集体记忆效应。这导致了二维电子流体的非牛顿流体力学，由具有尺度依赖粘度的多种粘性模式驱动。我们将这些模式描述为奇宇称在空间和时间上演化的费米表面调制，并讨论了它们对电子流体力学实验研究的意义。

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Two-dimensional electron gases as non-Newtonian fluids

Two-dimensional electron systems offer an appealing platform to explore long-lived excitations arising due to collinear carrier scattering enabled by phase-space constraints at the Fermi surface. Recently it was found that these effects can boost excitation lifetimes over the fundamental bound set by Landau’s Fermi-liquid theory by a factor as large as (TF/T)α with α≈2. Long-lived degrees of freedom possess the capability to amplify the response to weak perturbations, producing lasting collective memory effects. This leads to non-Newtonian hydrodynamics in 2D electron fluids driven by multiple viscous modes with scale-dependent viscosity. We describe these modes as Fermi surface modulations of odd parity evolving in space and time, and discuss their implications for experimental studies of electron hydrodynamics.

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来源期刊

Low Temperature Physics 物理-物理：应用

CiteScore

1.20

自引率

25.00%

发文量

138

审稿时长

3 months

期刊介绍： Guided by an international editorial board, Low Temperature Physics (LTP) communicates the results of important experimental and theoretical studies conducted at low temperatures. LTP offers key work in such areas as superconductivity, magnetism, lattice dynamics, quantum liquids and crystals, cryocrystals, low-dimensional and disordered systems, electronic properties of normal metals and alloys, and critical phenomena. The journal publishes original articles on new experimental and theoretical results as well as review articles, brief communications, memoirs, and biographies. Low Temperature Physics, a translation of the copyrighted Journal FIZIKA NIZKIKH TEMPERATUR, is a monthly journal containing English reports of current research in the field of the low temperature physics. The translation began with the 1975 issues. One volume is published annually beginning with the January issues.