A light-induced Weyl semiconductor-to-metal transition mediated by Peierls instability

Autor:	Ning, H., Mehio, O., Lian, C., Li, X., Zoghlin, E., Zhou, P., Cheng, B., Wilson, S. D., Wong, B. M., Hsieh, D.
Rok vydání:	2022
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. B 106, 205118 (2022)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.106.205118
Popis:	Elemental tellurium is a strongly spin-orbit coupled Peierls-distorted semiconductor whose band structure features topologically protected Weyl nodes. Using time-dependent density functional theory calculations, we show that impulsive optical excitation can be used to transiently control the amplitude of the Peierls distortion, realizing a mechanism to switch tellurium between three states: Weyl semiconductor, Weyl metal and non-Weyl metal. Further, we present experimental evidence of this inverse-Peierls distortion using time-resolved optical second harmonic generation measurements. These results provide a pathway to multifunctional ultrafast Weyl devices and introduce Peierls systems as viable hosts of light-induced topological transitions. Comment: 7 pages main text, 4 figures, 11 pages supplementary information
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2211.01501 Zobrazit plný text záznamu View this record from Arxiv