Abbreviated Journal Title
Appl. Phys. Lett.
Keywords
AUGMENTED-WAVE METHOD; MOLYBDENUM-DISULFIDE; MOS2; TRANSISTORS; PHOTOEMISSION; SPECTROSCOPY; POTASSIUM; MECHANISM; SURFACES; BEHAVIOR; Physics, Applied
Abstract
The influence of sodium on the band structure of MoS2(0001) and the comparison of the experimental band dispersion with density functional theory show excellent agreement for the occupied states (angle-resolved photoemission) and qualitative agreement for the unoccupied states (inverse photoemission spectroscopy). Na-adsorption leads to charge transfer to the MoS2 surface causing an effect similar to n-type doping of a semiconductor. The MoS2 occupied valence band structure shifts rigidly to greater binding with little change in the occupied state dispersion. Likewise, the unoccupied states shift downward, approaching the Fermi level, yet the amount of the shift for the unoccupied states is greater than that of the occupied states, effectively causing a narrowing of the MoS2 bandgap.
Journal Title
Applied Physics Letters
Volume
105
Issue/Number
24
Publication Date
1-1-2014
Document Type
Article
DOI Link
Language
English
First Page
4
WOS Identifier
ISSN
0003-6951
Recommended Citation
Komesu, Takashi; Le, Duy; Zhang, Xin; Ma, Quan; Schwier, Eike F.; Kojima, Yohei; Zheng, Mingtian; Iwasawa, Hideaki; Shimada, Kenya; Tangiguchi, Masaki; Bartels, Ludwig; Rahman, Talat S.; and Dowben, P. A., "Occupied and unoccupied electronic structure of Na doped MoS2(0001)" (2014). Faculty Bibliography 2010s. 5588.
https://stars.library.ucf.edu/facultybib2010/5588
Comments
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