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

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.

doi:10.1103/PhysRevB.95.245314

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

Journal Article · Wed Jun 28 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.95.245314· OSTI ID:1399870

Paul, J. ^[1]; Stevens, C. E. ^[1]; Zhang, H. ^[1]; Dey, P. ^[1]; McGinty, D. ^[1]; McGill, S. A. ^[2]; Smith, R. P. ^[3]; Reno, J. L. ^[4]; Turkowski, V. ^[5]; Perakis, I. E. ^[5]; Hilton, D. J. ^[5]; Karaiskaj, D. ^[1]

Univ. of South Florida, Tampa, FL (United States). Dept. of Physics
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
California State Univ. (CalState), Hayward, CA (United States). Dept. of Physics
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT)
Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics

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.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

Grant/Contract Number:: AC04-94AL85000; FG02-07ER46354; SC0012635; DMR-1409473

OSTI ID:: 1399870

Alternate ID(s):: OSTI ID: 1367366

Report Number(s):: SAND-2016-9927J; PRBMDO; 647993; TRN: US1703219

Journal Information:: Physical Review B, Vol. 95, Issue 24; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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