Chiral light amplifier with pumped Weyl semimetals

Autor:	Nishida, Yusuke
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Optics
Zdroj:	Phys. Rev. Lett. 130, 096903 (2023)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.130.096903
Popis:	Parallel electric and magnetic fields applied to Weyl semimetals pump axial charge via the axial anomaly until balanced by intervalley relaxation. The resulting nonequilibrium steady state exhibits the chiral magnetic effect as well as the anomalous Hall effect, which coupled with Maxwell's equations leads to unstable electromagnetic waves at low frequency and long wavelength. Here, we show that such chiral magnetic instability manifests itself as anomalous reflectance of the surface of pumped Weyl semimetal. Depending on electric, chiral magnetic, and anomalous Hall conductivities, the reflectance is found to exceed unity in a finite range of frequency for a circularly polarized light incident along the direction of Weyl node separation. Comment: 5 pages, 3 figures; published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2212.13025 Zobrazit plný text záznamu View this record from Arxiv