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Title: Adsorbate doping of MoS 2 and WSe 2 : the influence of Na and Co

Abstract

We have investigated the influence of metal adsorbates (sodium and cobalt) on the occupied and unoccupied electronic structure of MoS2(0 0 0 1) and WSe2(0 0 0 1), through a combination of both photoemission and inverse photoemission. The electronic structure is rigidly shifted in both the WSe2 and MoS2 systems, with either Na or Co adsorption, generally as predicted by accompanying density functional theory based calculations. Na adsorption is found to behave as an electron donor (n-type) in MoS2, while Co adsorption acts as an electron acceptor (p-type) in WSe2. The n-type transition metal dichalcogenide (MoS2) is easily doped more n-type with Na deposition while the p-type transition metal dichalcogenide (WSe2) is easily doped more p-type with Co deposition. The binding energy shifts have some correlation with the work function differences between the metallic adlayer and the transition metal dichalcogenide substrate.

Authors:
 [1];  [2];  [1];  [3];  [4];  [4];  [4];  [3];  [3];  [3];  [3];  [2];  [5]
  1. Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience, Dept. of Physics and Astronomy
  2. Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
  3. Hiroshima Univ., Higashi-Hiroshima (Japan). Hiroshima Synchrotron Radiation Center
  4. Hiroshima Univ., Higashi-Hiroshima (Japan). Graduate School of Science
  5. Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanosciencs, Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE
OSTI Identifier:
1523406
DOE Contract Number:  
FG02-07ER15842
Resource Type:
Journal Article
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 29; Journal Issue: 28; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

Citation Formats

Komesu, Takashi, Le, Duy, Tanabe, Iori, Schwier, Eike F., Kojima, Yohei, Zheng, Mingtian, Taguchi, Kazuaki, Miyamoto, Koji, Okuda, Taichi, Iwasawa, Hideaki, Shimada, Kenya, Rahman, Talat S., and Dowben, Peter A. Adsorbate doping of MoS 2 and WSe 2 : the influence of Na and Co. United States: N. p., 2017. Web. doi:10.1088/1361-648X/aa7482.
Komesu, Takashi, Le, Duy, Tanabe, Iori, Schwier, Eike F., Kojima, Yohei, Zheng, Mingtian, Taguchi, Kazuaki, Miyamoto, Koji, Okuda, Taichi, Iwasawa, Hideaki, Shimada, Kenya, Rahman, Talat S., & Dowben, Peter A. Adsorbate doping of MoS 2 and WSe 2 : the influence of Na and Co. United States. doi:10.1088/1361-648X/aa7482.
Komesu, Takashi, Le, Duy, Tanabe, Iori, Schwier, Eike F., Kojima, Yohei, Zheng, Mingtian, Taguchi, Kazuaki, Miyamoto, Koji, Okuda, Taichi, Iwasawa, Hideaki, Shimada, Kenya, Rahman, Talat S., and Dowben, Peter A. Mon . "Adsorbate doping of MoS 2 and WSe 2 : the influence of Na and Co". United States. doi:10.1088/1361-648X/aa7482.
@article{osti_1523406,
title = {Adsorbate doping of MoS 2 and WSe 2 : the influence of Na and Co},
author = {Komesu, Takashi and Le, Duy and Tanabe, Iori and Schwier, Eike F. and Kojima, Yohei and Zheng, Mingtian and Taguchi, Kazuaki and Miyamoto, Koji and Okuda, Taichi and Iwasawa, Hideaki and Shimada, Kenya and Rahman, Talat S. and Dowben, Peter A.},
abstractNote = {We have investigated the influence of metal adsorbates (sodium and cobalt) on the occupied and unoccupied electronic structure of MoS2(0 0 0 1) and WSe2(0 0 0 1), through a combination of both photoemission and inverse photoemission. The electronic structure is rigidly shifted in both the WSe2 and MoS2 systems, with either Na or Co adsorption, generally as predicted by accompanying density functional theory based calculations. Na adsorption is found to behave as an electron donor (n-type) in MoS2, while Co adsorption acts as an electron acceptor (p-type) in WSe2. The n-type transition metal dichalcogenide (MoS2) is easily doped more n-type with Na deposition while the p-type transition metal dichalcogenide (WSe2) is easily doped more p-type with Co deposition. The binding energy shifts have some correlation with the work function differences between the metallic adlayer and the transition metal dichalcogenide substrate.},
doi = {10.1088/1361-648X/aa7482},
journal = {Journal of Physics. Condensed Matter},
issn = {0953-8984},
number = 28,
volume = 29,
place = {United States},
year = {2017},
month = {6}
}

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