Optical valleytronics of impurity states in two-dimensional Dirac materials

Dogyun Ko, A. V. Morozov, V. M. Kovalev, I. G. Savenko

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We analyze the valley selection rules for optical transitions from impurity states to the conduction band in two-dimensional Dirac materials, taking a monolayer of MoS2 as an example. We employ the analytical model of a shallow impurity potential which localizes electrons described by a spinor wave function, and, first, find the system eigenstates taking into account the presence of two valleys in the Brillouin zone. Then, we find the spectrum of the absorbance and calculate the photon-drag electric current due to the impurity-band transitions, drawing the general conclusions regarding the valley optical selection rules for the impurity-band optical transitions in gapped Dirac materials.

Original languageEnglish
Article numberL161301
JournalPhysical Review B
Issue number16
StatePublished - 9 Apr 2021
Externally publishedYes


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