Helicity selection rule of double resonance Raman spectra for monolayer MoSe2
Journal
Physical Review B
Journal Volume
110
Journal Issue
24
Start Page
245422
ISSN
24699950
24699969
Date Issued
2024
Author(s)
Liu, Renhui
Li, Linhan
Zhang, Ye
Huang, Jianqi
Lin, Miaoling
Wang, Zhenhua
Zhang, Zhidong
Saito, Riichiro
Tan, Pingheng
Abstract
Second-order Raman spectra of monolayer MoSe2 are observed by using circularly polarized light for four laser energies, which are resonant with the C exciton. Helicity-dependent Raman spectra show that the overtone mode of a helicity-changing mode observed at 560-610cm-1 is a helicity-conserved mode, while the combinational mode of helicity-changing modes is still a helicity-changing mode. We discuss the selection rule of helicity-dependent double resonance Raman spectra by using first-principles density functional calculations and Raman tensor analysis, in which overtone and combinational modes give exactly opposite helicity-dependent behaviors after the decomposition to the Γ point.
Subjects
Circular Polarization
Light Polarization
Selenium Compounds
Circularly Polarized Light
Double Resonance
First-principles Density Functional Calculations
Helicities
Laser's Energy
Raman Tensor
Resonance Raman Spectra
Second Orders
Selection Rules
Spectra's
Monolayers
Publisher
American Physical Society
Type
journal article