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Title: Giant magneto-optical Raman effect in a layered transition metal compound

Here, 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:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Renmin Univ. of China, Beijing (People's Republic of China)
  2. Renmin Univ. of China, Beijing (People's Republic of China); Shanghai Jiao Tong Univ., Shanghai (People's Republic of China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (People's Republic of China)
  3. Louisiana State Univ., Baton Rouge, LA (United States)
  4. Renmin Univ. of China, Beijing (People's Republic of China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (People's Republic of China)
Publication Date:
Grant/Contract Number:
SC0002136; DOE DE-SC0002136
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 9; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Research Org:
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 36 MATERIALS SCIENCE; Raman; layered; magneto-optical; broken symmetry; phonon
OSTI Identifier:
1238205
Alternate Identifier(s):
OSTI ID: 1348211