We have measured the impact of ad-atoms on MoS$_{2}$ using photoluminescence (PL) and Raman spectroscopy. We find that ad-atoms induce a new peak in the PL spectra, indicating that excitons are bound at the ad-atom sites. Our results will be discussed in light of recent density functional theory calculations.
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Authors
Jyoti Katoch
Department of Physics and Nanoscience Technology Center, University of Central Florida, Orlando, FL
Simranjeet Singh
Department of Physics, University of Central Florida
Department of Physics, University of Central Florida, Orlando, FL
Duy Le
Department of Physics, University of Central Florida
Department of Physics, University of Central Florida, Orlando, FL
University of Central Florida, Department of Physics, Orlando FL 32816-2385, USA
Daniel Chenet
Department of Mechanical Engineering, Columbia University, New York
Arend van der Zande
Columbia University
Department of Mechanical Engineering, Columbia University, New York
James Hone
Columbia University
Department of Mechanical Engineering, Columbia University, New York
Talat S. Rahman
University of Central Florida
Department of Physics, University of Central Florida
Department of Physics, University of Central Florida, Orlando, FL
Physics Department, University of Central Florida
Laurene Tetard
Nanoscience Technology Center, University of Central Florida, Orlando, FL
Masahiro Ishigami
Department of Physics and Nanoscience Technology Center, University of Central Florida, Orlando, FL
