Year: 2023
Type: article
Abstract: When continuous rotational invariance of a two-dimensional fluid is broken to the discrete, dihedral subgroup D_6 D 6 - the point group of an equilateral triangle - the resulting anisotropic hydrodynamics breaks both spatial-inversion and time-reversal symmetries, while preserving their combination. In this work, we present the hydrodynamics of such D_6 D 6 -symmetric fluids, identifying new symmetry-allowed dissipative terms in the hydrodynamic equations of motion. We propose two experiments - both involving high-purity solid-state materials with D_6 D 6 -invariant Fermi surfaces - that are sensitive to these new coefficients in a D_6 D 6 -invariant electron fluid. In particular, we propose a local current imaging experiment (which is present-day realizable with nitrogen vacancy center magnetometry) in a hexagonal device, whose D_6 D 6 -exploiting boundary conditions enable the unambiguous detection of these novel transport coefficients.
Source: SciPost Physics
Authors: Aaron J. Friedman, Caleb Q. Cook, Andrew Lucas
Institutions: University of Colorado Boulder, Stanford University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4378907483