Entropy Wave Instability in Dirac and Weyl Semimetals
| Autor: | Pavlo O. Sukhachov, Igor A. Shovkovy, E. V. Gorbar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Energy current General Physics and Astronomy FOS: Physical sciences Plasma oscillation Instability Entropy (classical thermodynamics) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Flow velocity Quantum electrodynamics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Fluid dynamics Quasiparticle Boundary value problem |
| DOI: | 10.48550/arxiv.2106.11992 |
| Popis: | Hydrodynamic instabilities driven by a direct current are analyzed in 2D and 3D relativisticlike systems with the Dyakonov-Shur boundary conditions supplemented by a boundary condition for temperature. Besides the conventional Dyakonov-Shur instability for plasmons, we find an entropy wave instability in both 2D and 3D systems. The entropy wave instability is a manifestation of the relativisticlike nature of electron quasiparticles and a nontrivial role of the energy current in such systems. These two instabilities occur for the opposite directions of fluid flow. While the Dyakonov-Shur instability is characterized by the plasma frequency in 3D and the system size in 2D, the frequency of the entropy wave instability is tunable by the system size and the flow velocity. Comment: 6+11 pages, 1+6 multi-panel figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|