title: Transport theory of monolayer transition-metal dichalcogenides through symmetry.
abstract: We present a theory that elucidates the major momentum and spin relaxation processes for electrons, holes, and hot excitons in monolayer transition-metal dichalcogenides. We expand on spin flips induced by flexural phonons and show that the spin relaxation is ultrafast for electrons in free-standing membranes while being mitigated in supported membranes. This behavior due to interaction with flexural phonons is universal in two-dimensional membranes that respect mirror symmetry, and it leads to a counterintuitive inverse relation between mobility and spin relaxation.
authors.affiliation: Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA. yang.song@rochester.edu
authors.forename: Yang
authors.initials: Y
authors.lastname: Song
authors.forename: Hanan
authors.initials: H
authors.lastname: Dery