title: Giant magneto-optical Raman effect in a layered transition metal compound.
abstract: We report a dramatic change in the intensity of a Raman mode with applied magnetic field, displaying a gigantic magneto-optical effect. Using the nonmagnetic layered material MoS2 as a prototype system, we demonstrate that the application of a magnetic field perpendicular to the layers produces a dramatic change in intensity for the out-of-plane vibrations of S atoms, but no change for the in-plane breathing mode. The distinct intensity variation between these two modes results from the effect of field-induced broken symmetry on Raman scattering cross-section. A quantitative analysis on the field-dependent integrated Raman intensity provides a unique method to precisely determine optical mobility. Our analysis is symmetry-based and material-independent, and thus the observations should be general and inspire a new branch of inelastic light scattering and magneto-optical applications.
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China;
authors.forename: Jianting
authors.initials: J
authors.lastname: Ji
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China;
authors.forename: Anmin
authors.initials: A
authors.lastname: Zhang
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China;
authors.forename: Jiahe
authors.initials: J
authors.lastname: Fan
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China;
authors.forename: Yuesheng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China; Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, People's Republic of China;
authors.forename: Xiaoqun
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70808.
authors.forename: Jiandi
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70808 wplummer@phys.lsu.edu qmzhang@ruc.edu.cn.
authors.forename: E W
authors.initials: EW
authors.lastname: Plummer
authors.affiliation: Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, People's Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, People's Republic of China; wplummer@phys.lsu.edu qmzhang@ruc.edu.cn.
authors.forename: Qingming
authors.initials: Q
authors.lastname: Zhang
keywords: Raman; broken symmetry; layered; magneto-optical; phonon