Magnetoreflection spectroscopy of monolayer transition-metal dichalcogenide semiconductors in pulsed magnetic fields

Stier, Andreas V.; McCreary, Kathleen M.; Jonker, Berend T.; Kono, Junichiro; Crooker, Scott A.

doi:10.1116/1.4948992

Title: Magnetoreflection spectroscopy of monolayer transition-metal dichalcogenide semiconductors in pulsed magnetic fields

Journal Article · Fri May 13 00:00:00 EDT 2016 · Journal of Vacuum Science and Technology B

DOI: https://doi.org/10.1116/1.4948992 · OSTI ID:1340969

^[1]; McCreary, Kathleen M. ^[2]; Jonker, Berend T. ^[2]; Kono, Junichiro ^[3]; Crooker, Scott A. ^[1]

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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: National Science Foundation; 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, Journal Name: Journal of Vacuum Science and Technology B Journal Issue: 4 Vol. 34; ISSN 2166-2746

Publisher:: American Vacuum Society/AIPCopyright Statement

Country of Publication:: United States

Language:: English

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Monolayer transition metal dichalcogenides in strong magnetic fields: Validating the Wannier model using a microscopic calculation Have, J.; Catarina, G.; Pedersen, T. G. Physical Review B, Vol. 99, Issue 3 https://doi.org/10.1103/physrevb.99.035416	journal	January 2019
Probing many-body interactions in monolayer transition-metal dichalcogenides Van Tuan, Dinh; Scharf, Benedikt; Wang, Zefang Physical Review B, Vol. 99, Issue 8 https://doi.org/10.1103/physrevb.99.085301	journal	February 2019
Probing Many-Body Interactions in Monolayer Transition-Metal Dichalcogenides Van Tuan, Dinh; Scharf, Benedikt; Wang, Zefang arXiv https://doi.org/10.48550/arxiv.1606.07101	text	January 2016

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