title: Quantum Transport and Observation of Dyakonov-Perel Spin-Orbit Scattering in Monolayer MoS_{2}.
abstract: Monolayers of group 6 transition metal dichalcogenides are promising candidates for future spin-, valley-, and charge-based applications. Quantum transport in these materials reflects a complex interplay between real spin and pseudospin (valley) relaxation processes, which leads to either positive or negative quantum correction to the classical conductivity. Here we report experimental observation of a crossover from weak localization to weak antilocalization in highly n-doped monolayer MoS_{2}. We show that the crossover can be explained by a single parameter associated with electron spin lifetime of the system. At low temperatures and high carrier densities, the spin lifetime is inversely proportional to momentum relaxation time; this indicates that spin relaxation occurs via a Dyakonov-Perel mechanism.
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
authors.forename: H
authors.initials: H
authors.lastname: Schmidt
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
authors.forename: I
authors.initials: I
authors.lastname: Yudhistira
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
authors.forename: L
authors.initials: L
authors.lastname: Chu
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
authors.forename: A H
authors.initials: AH
authors.lastname: Castro Neto
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
authors.forename: B
authors.initials: B
authors.lastname: Özyilmaz
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.|Yale-NUS College, 16 College Ave West, 138527 Singapore.
authors.forename: S
authors.initials: S
authors.lastname: Adam
authors.affiliation: Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546 Singapore.|Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.|Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore.
authors.forename: G
authors.initials: G
authors.lastname: Eda