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Title: Spectroscopic signatures of AA' and AB stacking of chemical vapor deposited bilayer MoS2

We discuss prominent resonance Raman and photoluminescence spectroscopic differences between AA'and AB stacked bilayer molybdenum disulfide (MoS2) grown by chemical vapor deposition are reported. Bilayer MoS2 islands consisting of the two stacking orders were obtained under identical growth conditions. Also, resonance Raman and photoluminescence spectra of AA' and AB stacked bilayer MoS2 were obtained on Au nanopyramid surfaces under strong plasmon resonance. Both resonance Raman and photoluminescence spectra show distinct features indicating clear differences in interlayer interaction between these two phases. The implication of these findings on device applications based on spin and valley degrees of freedom.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [2] ;  [5] ;  [2] ;  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Rice Univ., Houston, TX (United States)
  3. Southeast Univ., Nanjing (China). School of Energy and Environment; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Innovations for High Performance (IHP), Frankfurt (Germany)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
1252727
Grant/Contract Number:
W-7405-ENG-26
Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society
Research Org:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY molybdenum disulfide; bilayer stacking; Au nanopyramids; photoluminescence; resonance Raman