Entropy Wave Instability in Dirac and Weyl Semimetals

Autor:	Sukhachov, P. O., Gorbar, E. V., Shovkovy, I. A.
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics High Energy Physics - Phenomenology
Zdroj:	Phys. Rev. Lett. 127, 176602 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.127.176602
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:	arXiv
Externí odkaz:	http://arxiv.org/abs/2106.11992 Zobrazit plný text záznamu View this record from Arxiv