title: Magnetic-Field-Induced Rotation of Polarized Light Emission from Monolayer WS_{2}.
abstract: We control the linear polarization of emission from the coherently emitting K^{+} and K^{-} valleys (valley coherence) in monolayer WS_{2} with an out-of-plane magnetic field of up to 25 T. The magnetic-field-induced valley Zeeman splitting causes a rotation of the emission polarization with respect to the excitation by up to 35° and reduces the polarization degree by up to 16%. We explain both of these phenomena with a model based on two noninteracting coherent two-level systems. We deduce that the coherent light emission from the valleys decays with a time constant of τ_{c}=260  fs.
authors: Institute of Physics and Center for Nanotechnology, University of Münster, 48149 Münster, Germany.
authors: Robert
authors: R
authors: Schmidt
authors: Institute of Physics and Center for Nanotechnology, University of Münster, 48149 Münster, Germany.
authors: Ashish
authors: A
authors: Arora
authors: Department of Physics, University of Regensburg, 93040 Regensburg, Germany.
authors: Gerd
authors: G
authors: Plechinger
authors: Department of Physics, University of Regensburg, 93040 Regensburg, Germany.
authors: Philipp
authors: P
authors: Nagler
authors: High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands.
authors: Andrés
authors: A
authors: Granados Del Águila
authors: High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands.
authors: Mariana V
authors: MV
authors: Ballottin
authors: High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands.
authors: Peter C M
authors: PC
authors: Christianen
authors: Institute of Physics and Center for Nanotechnology, University of Münster, 48149 Münster, Germany.
authors: Steffen
authors: S
authors: Michaelis de Vasconcellos
authors: Department of Physics, University of Regensburg, 93040 Regensburg, Germany.
authors: Christian
authors: C
authors: Schüller
authors: Department of Physics, University of Regensburg, 93040 Regensburg, Germany.
authors: Tobias
authors: T
authors: Korn
authors: Institute of Physics and Center for Nanotechnology, University of Münster, 48149 Münster, Germany.
authors: Rudolf
authors: R
authors: Bratschitsch