Author:
Ji Jianting,Zhang Anmin,Fan Jiahe,Li Yuesheng,Wang Xiaoqun,Zhang Jiandi,Plummer E. W.,Zhang Qingming
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.
Funder
Ministry of Science and Technology of China
Ministry of Science and Technology of the People's Republic of China
U.S. Department of Energy
Publisher
Proceedings of the National Academy of Sciences
Cited by
24 articles.
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