Electronic structure, spin-orbit coupling, and interlayer interaction in bulk and
Abstract
Here, we present in-depth measurements of the electronic band structure of the transition-metal dichalcogenides (TMDs) MoS2 and WS2 using angle-resolved photoemission spectroscopy, with focus on the energy splittings in their valence bands at the K point of the Brillouin zone. Experimental results are interpreted in terms of our parallel first-principles computations. We find that interlayer interaction only weakly contributes to the splitting in bulk WS2, resolving previous debates on its relative strength. We additionally find that across a range of TMDs, the band gap generally decreases with increasing magnitude of the valence-band splitting, molecular mass, or ratio of the out-of-plane to in-plane lattice constant. Our findings offer an important reference for future studies of electronic properties of MoS2 and WS2 and their applications in spintronics and valleytronics devices.
- Authors:
-
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Arizona State Univ., Tempe, AZ (United States)
- National Tsing Hua Univ., Hsinchu (Taiwan)
- National Univ. of Singapore (Singapore)
- National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
- Northeastern Univ., Boston, MA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for the Computational Design of Functional Layered Materials (CCDM)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1371089
- Alternate Identifier(s):
- OSTI ID: 1184434
- Grant/Contract Number:
- SC0012575; AC02-05CH11231; FG02-07ER46352
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 23; Related Information: CCDM partners with Temple University (lead); Brookhaven National Laboratory; Drexel University; Duke University; North Carolina State University; Northeastern University; Princeton University; Rice University; University of Pennsylvania; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Latzke, Drew W., Zhang, Wentao, Suslu, Aslihan, Chang, Tay-Rong, Lin, Hsin, Jeng, Horng-Tay, Tongay, Sefaattin, Wu, Junqiao, Bansil, Arun, and Lanzara, Alessandra. Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS2 and WS2. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.91.235202.
Latzke, Drew W., Zhang, Wentao, Suslu, Aslihan, Chang, Tay-Rong, Lin, Hsin, Jeng, Horng-Tay, Tongay, Sefaattin, Wu, Junqiao, Bansil, Arun, & Lanzara, Alessandra. Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS2 and WS2. United States. https://doi.org/10.1103/PhysRevB.91.235202
Latzke, Drew W., Zhang, Wentao, Suslu, Aslihan, Chang, Tay-Rong, Lin, Hsin, Jeng, Horng-Tay, Tongay, Sefaattin, Wu, Junqiao, Bansil, Arun, and Lanzara, Alessandra. 2015.
"Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS2 and WS2". United States. https://doi.org/10.1103/PhysRevB.91.235202. https://www.osti.gov/servlets/purl/1371089.
@article{osti_1371089,
title = {Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS2 and WS2},
author = {Latzke, Drew W. and Zhang, Wentao and Suslu, Aslihan and Chang, Tay-Rong and Lin, Hsin and Jeng, Horng-Tay and Tongay, Sefaattin and Wu, Junqiao and Bansil, Arun and Lanzara, Alessandra},
abstractNote = {Here, we present in-depth measurements of the electronic band structure of the transition-metal dichalcogenides (TMDs) MoS2 and WS2 using angle-resolved photoemission spectroscopy, with focus on the energy splittings in their valence bands at the K point of the Brillouin zone. Experimental results are interpreted in terms of our parallel first-principles computations. We find that interlayer interaction only weakly contributes to the splitting in bulk WS2, resolving previous debates on its relative strength. We additionally find that across a range of TMDs, the band gap generally decreases with increasing magnitude of the valence-band splitting, molecular mass, or ratio of the out-of-plane to in-plane lattice constant. Our findings offer an important reference for future studies of electronic properties of MoS2 and WS2 and their applications in spintronics and valleytronics devices.},
doi = {10.1103/PhysRevB.91.235202},
url = {https://www.osti.gov/biblio/1371089},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 23,
volume = 91,
place = {United States},
year = {Thu Jun 11 00:00:00 EDT 2015},
month = {Thu Jun 11 00:00:00 EDT 2015}
}
Web of Science
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