Photocurrent Response of Topological Insulator Surface States

Autor:	Junck, Alexandra, Refael, Gil, von Oppen, Felix
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 88, 075144 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.88.075144
Popis:	We study the photocurrent response of topological insulator surface states to circularly polarized light for arbitrary oblique incidence. We describe the surface states within a Dirac model, including several perturbations such as hexagonal warping, nonlinear corrections to the mode velocity, and applied magnetic fields. We find that the photogalvanic current is strongly suppressed for the usual orbital coupling, prompting us to include the weaker Zeeman coupling. We find that the helicity-independent photocurrent dominates over the helicity-dependent contributions. Comment: 8 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1301.4392 Zobrazit plný text záznamu View this record from Arxiv