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Title: Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor

Abstract

In this paper, we report 65 T magnetoabsorption spectroscopy of exciton Rydberg states in the archetypal monolayer semiconductor WSe 2 . The strongly field-dependent and distinct energy shifts of the 2 s , 3 s , and 4 s excited neutral excitons permits their unambiguous identification and allows for quantitative comparison with leading theoretical models. Both the sizes (via low-field diamagnetic shifts) and the energies of the n s exciton states agree remarkably well with detailed numerical simulations using the nonhydrogenic screened Keldysh potential for 2D semiconductors. Finally and moreover, at the highest magnetic fields, the nearly linear diamagnetic shifts of the weakly bound 3 s and 4 s excitons provide a direct experimental measure of the exciton’s reduced mass m r = 0.20 ± 0.01 m 0 .

Authors:
 [1];  [2];  [3];  [4];  [2];  [1]
  1. National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States)
  2. Univ. of Washington, Seattle, WA (United States). Dept. of Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering. Dept. of Physics and Astronomy. Dept. of Materials Science and NanoEngineering
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Washington, Seattle, WA (United States); National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States); Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1475347
Alternate Identifier(s):
OSTI ID: 1419092
Report Number(s):
LA-UR-17-27395
Journal ID: ISSN 0031-9007
Grant/Contract Number:  
AC52-06NA25396; SC0018171; DMR-1157490; FA9550-14-1-0268
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; diamagnetism; excitons; magneto-optical spectra; Zeeman effect; 2-dimensional systems; transition-metal dichalcogenide

Citation Formats

Stier, A. V., Wilson, N. P., Velizhanin, K. A., Kono, J., Xu, X., and Crooker, S. A. Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.057405.
Stier, A. V., Wilson, N. P., Velizhanin, K. A., Kono, J., Xu, X., & Crooker, S. A. Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor. United States. https://doi.org/10.1103/PhysRevLett.120.057405
Stier, A. V., Wilson, N. P., Velizhanin, K. A., Kono, J., Xu, X., and Crooker, S. A. Thu . "Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor". United States. https://doi.org/10.1103/PhysRevLett.120.057405. https://www.osti.gov/servlets/purl/1475347.
@article{osti_1475347,
title = {Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor},
author = {Stier, A. V. and Wilson, N. P. and Velizhanin, K. A. and Kono, J. and Xu, X. and Crooker, S. A.},
abstractNote = {In this paper, we report 65 T magnetoabsorption spectroscopy of exciton Rydberg states in the archetypal monolayer semiconductor WSe2. The strongly field-dependent and distinct energy shifts of the 2s, 3s, and 4s excited neutral excitons permits their unambiguous identification and allows for quantitative comparison with leading theoretical models. Both the sizes (via low-field diamagnetic shifts) and the energies of the ns exciton states agree remarkably well with detailed numerical simulations using the nonhydrogenic screened Keldysh potential for 2D semiconductors. Finally and moreover, at the highest magnetic fields, the nearly linear diamagnetic shifts of the weakly bound 3s and 4s excitons provide a direct experimental measure of the exciton’s reduced mass mr=0.20±0.01m0.},
doi = {10.1103/PhysRevLett.120.057405},
journal = {Physical Review Letters},
number = 5,
volume = 120,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 19 works
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