Ultrafast dynamics of helical Dirac fermions in the topological insulators

• Published in: Advances in physics: X Vol. 7; no. 1
• Main Authors: Bai, Ya, Li, Na, Li, Ruxin, Liu, Peng
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 31.12.2022; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: Backscattering; Crystals; Fermions; Helicity; high-harmonic generation; Laboratories; Lasers; Light; Materials science; Optics; photocurrents; Photoelectric effect; Physics; Spin dynamics; Symmetry; Terahertz frequencies; Topological insulators; Topological surface states; ultrafast electron dynamics

Three-dimensional topological insulators feature unconventional two-dimensional surface states, the carriers in which are helical Dirac fermions and protected from backscattering. Thus, they exhibit novel electronic response upon illuminate ultrashort and intense laser light. We briefly reviewed rec...