Hydrodynamics with triangular point group | CU Experts

; 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.;

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