Magnetoreflection spectroscopy of monolayer transition-metal dichalcogenide semiconductors in pulsed magnetic fields
Abstract
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. Finally, 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 13, 2016
- Source ID
- 10.1116/1.4948992
Entities
People
- Andreas V Stier
- Berend T Jonker
- Junichiro Kono
- Kathleen M McCreary
- Scott Crooker
Organizations
- Air Force Office of Scientific Research
- National High Magnetic Field Laboratory
- National Science Foundation
- Rice University
- United States Naval Research Laboratory