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Title: Coulomb-interaction induced coupling of Landau levels in intrinsic and modulation-doped quantum wells

Abstract

We have performed two-dimensional Fourier transform spectroscopy on intrinsic and modulation doped quantum wells in external magnetic fields up to 10 T. In the undoped sample, the strong Coulomb interactions and the increasing separations of the electron and hole charge distributions with increasing magnetic fields lead to a nontrivial in-plane dispersion of the magneto-excitons. Thus, the discrete and degenerate Landau levels are coupled to a continuum. The signature of this continuum is the emergence of elongated spectral line shapes at the Landau level energies, which are exposed by the multidimensional nature of our technique. Surprisingly, the elongation of the peaks is completely absent in the lowest Landau level spectra obtained from the modulation doped quantum well at high fields.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [5];  [5];  [1]
  1. Univ. of South Florida, Tampa, FL (United States). Dept. of Physics
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  3. California State Univ. (CalState), Hayward, CA (United States). Dept. of Physics
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT)
  5. Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1399870
Alternate Identifier(s):
OSTI ID: 1367366
Report Number(s):
SAND-2016-9927J
Journal ID: ISSN 2469-9950; PRBMDO; 647993; TRN: US1703219
Grant/Contract Number:  
AC04-94AL85000; FG02-07ER46354; SC0012635; DMR-1409473
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Paul, J., Stevens, C. E., Zhang, H., Dey, P., McGinty, D., McGill, S. A., Smith, R. P., Reno, J. L., Turkowski, V., Perakis, I. E., Hilton, D. J., and Karaiskaj, D. Coulomb-interaction induced coupling of Landau levels in intrinsic and modulation-doped quantum wells. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.245314.
Paul, J., Stevens, C. E., Zhang, H., Dey, P., McGinty, D., McGill, S. A., Smith, R. P., Reno, J. L., Turkowski, V., Perakis, I. E., Hilton, D. J., & Karaiskaj, D. Coulomb-interaction induced coupling of Landau levels in intrinsic and modulation-doped quantum wells. United States. doi:10.1103/PhysRevB.95.245314.
Paul, J., Stevens, C. E., Zhang, H., Dey, P., McGinty, D., McGill, S. A., Smith, R. P., Reno, J. L., Turkowski, V., Perakis, I. E., Hilton, D. J., and Karaiskaj, D. Wed . "Coulomb-interaction induced coupling of Landau levels in intrinsic and modulation-doped quantum wells". United States. doi:10.1103/PhysRevB.95.245314. https://www.osti.gov/servlets/purl/1399870.
@article{osti_1399870,
title = {Coulomb-interaction induced coupling of Landau levels in intrinsic and modulation-doped quantum wells},
author = {Paul, J. and Stevens, C. E. and Zhang, H. and Dey, P. and McGinty, D. and McGill, S. A. and Smith, R. P. and Reno, J. L. and Turkowski, V. and Perakis, I. E. and Hilton, D. J. and Karaiskaj, D.},
abstractNote = {We have performed two-dimensional Fourier transform spectroscopy on intrinsic and modulation doped quantum wells in external magnetic fields up to 10 T. In the undoped sample, the strong Coulomb interactions and the increasing separations of the electron and hole charge distributions with increasing magnetic fields lead to a nontrivial in-plane dispersion of the magneto-excitons. Thus, the discrete and degenerate Landau levels are coupled to a continuum. The signature of this continuum is the emergence of elongated spectral line shapes at the Landau level energies, which are exposed by the multidimensional nature of our technique. Surprisingly, the elongation of the peaks is completely absent in the lowest Landau level spectra obtained from the modulation doped quantum well at high fields.},
doi = {10.1103/PhysRevB.95.245314},
journal = {Physical Review B},
number = 24,
volume = 95,
place = {United States},
year = {2017},
month = {6}
}

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