Tomographic Dynamics and Scale-Dependent Viscosity in 2D Electron Systems
Name
PhysRevLett.123.116601.pdf
Description
Published version
Size
452.4 KB
Format
Adobe PDF
Checksum (MD5)
df972c01c48ce5f8309f8cc0b1602b3f
Author(s)
Ledwith, Patrick
Guo, Haoyu
Shytov, Andrey
Levitov, Leonid
Date Issued
2019
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 American Physical Society. Fermi gases in two dimensions display collective dynamics originating from head-on collisions, a collinear carrier scattering process that dominates angular relaxation at not-too-high temperatures TTF. In this regime, a large family of excitations emerges, with an odd-parity angular structure of momentum distribution and exceptionally long lifetimes. This leads to "tomographic" dynamics: Fast 1D spatial diffusion along the unchanging velocity direction accompanied by a slow angular dynamics that gradually randomizes velocity orientation. The tomographic regime features an unusual hierarchy of timescales and scale-dependent transport coefficients with nontrivial fractional scaling dimensions, leading to fractional-power current flow profiles and unusual conductance scaling versus sample width.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.123.116601
