Abstract:
:Rotational invariance strongly constrains the viscosity tensor of classical fluids. When this symmetry is broken in anisotropic materials a wide array of novel phenomena become possible. We explore electron fluid behaviors arising from the most general viscosity tensors in two and three dimensions, constrained only thermodynamics and crystal symmetries. We find nontrivial behaviors in both two- and three-dimensional materials, including imprints of the crystal symmetry on the large-scale flow pattern. Breaking time-reversal symmetry introduces a non-dissipative Hall component to the viscosity tensor, and while this vanishes for 3D isotropic systems we show it need not for anisotropic materials. Further, for such systems we find that the electronic fluid stress can couple to the vorticity without breaking time-reversal symmetry. Our work demonstrates the anomalous landscape for electron hydrodynamics in systems beyond graphene, and presents experimental geometries to quantify the effects of electronic viscosity.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Varnavides G,Jermyn AS,Anikeeva P,Felser C,Narang Pdoi
10.1038/s41467-020-18553-ysubject
Has Abstractpub_date
2020-09-18 00:00:00pages
4710issue
1issn
2041-1723pii
10.1038/s41467-020-18553-yjournal_volume
11pub_type
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