Magnetoreflection spectroscopy of monolayer transition-metal dichalcogenide semiconductors in pulsed magnetic fields
- National High Magnetic Field Lab., Los Alamos, NM (United States)
- Naval Research Lab., Washington, D.C. (United States)
- Rice Univ., Houston, TX (United States)
The authors describe recent experimental efforts to perform polarization-resolved optical spectroscopy of monolayer transition-metal dichalcogenide semiconductors in very large pulsed magnetic fields to 65 T. The experimental setup and technical challenges are discussed in detail, and temperature-dependent magnetoreflection spectra from atomically thin tungsten disulphide are presented. The data clearly reveal not only the valley Zeeman effect in these two-dimensional semiconductors but also the small quadratic exciton diamagnetic shift from which the very small exciton size can be directly inferred. Lastly, the authors present model calculations that demonstrate how the measured diamagnetic shifts can be used to constrain estimates of the exciton binding energy in this new family of monolayer semiconductors.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1340969
- Report Number(s):
- LA-UR-16-23036
- Journal Information:
- Journal of Vacuum Science and Technology B, Vol. 34, Issue 4; ISSN 2166-2746
- Publisher:
- American Vacuum Society/AIPCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Probing Many-Body Interactions in Monolayer Transition-Metal Dichalcogenides | text | January 2016 |
Monolayer transition metal dichalcogenides in strong magnetic fields: Validating the Wannier model using a microscopic calculation
|
journal | January 2019 |
Probing many-body interactions in monolayer transition-metal dichalcogenides
|
journal | February 2019 |
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