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Title: Effects of strain and quantum confinement in optically pumped nuclear magnetic resonance in GaAs: Interpretation guided by spin-dependent band structure calculations

Abstract

A combined experimental-theoretical study of optically pumped NMR (OPNMR) has been performed in a GaAs/Al0.1Ga0.9As quantum well film with thermally induced biaxial strain. The photon energy dependence of the Ga-71 OPNMR signal was recorded at magnetic fields of 4.9 and 9.4 T at a temperature of 4.8-5.4 K. The data were compared to the nuclear spin polarization calculated from differential absorption to spin-up and spin-down states of the conduction band using a modified Pidgeon Brown model. Reasonable agreement between theory and experiment is obtained, facilitating assignment of features in the OPNMR energy dependence to specific interband transitions. Despite the approximations made in the quantum-mechanical model and the inexact correspondence between the experimental and calculated observables, the results provide insight into how effects of strain and quantum confinement are manifested in OPNMR signals

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [1];  [1]
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  1. Univ. of Florida, Gainesville, FL (United States)
  2. National High Magnetic Field Lab., Tallahassee, FL (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1226082
Alternate Identifier(s):
OSTI ID: 1181332
Report Number(s):
SAND-2014-17522J
Journal ID: ISSN 1098-0121; PRBMDO; 537386
Grant/Contract Number:  
AC04-94AL85000; AC04–94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 15; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wood, R. M., Saha, D., McCarthy, L. A., Tokarski, III, J. T., Sanders, G. D., Kuhns, P. L., McGill, S. A., Reyes, A. P., Reno, J. L., Stanton, C. J., and Bowers, C. R. Effects of strain and quantum confinement in optically pumped nuclear magnetic resonance in GaAs: Interpretation guided by spin-dependent band structure calculations. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.90.155317.
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Wood, R. M., Saha, D., McCarthy, L. A., Tokarski, III, J. T., Sanders, G. D., Kuhns, P. L., McGill, S. A., Reyes, A. P., Reno, J. L., Stanton, C. J., & Bowers, C. R. Effects of strain and quantum confinement in optically pumped nuclear magnetic resonance in GaAs: Interpretation guided by spin-dependent band structure calculations. United States. https://doi.org/10.1103/PhysRevB.90.155317
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Wood, R. M., Saha, D., McCarthy, L. A., Tokarski, III, J. T., Sanders, G. D., Kuhns, P. L., McGill, S. A., Reyes, A. P., Reno, J. L., Stanton, C. J., and Bowers, C. R. Wed . "Effects of strain and quantum confinement in optically pumped nuclear magnetic resonance in GaAs: Interpretation guided by spin-dependent band structure calculations". United States. https://doi.org/10.1103/PhysRevB.90.155317. https://www.osti.gov/servlets/purl/1226082.
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@article{osti_1226082,
title = {Effects of strain and quantum confinement in optically pumped nuclear magnetic resonance in GaAs: Interpretation guided by spin-dependent band structure calculations},
author = {Wood, R. M. and Saha, D. and McCarthy, L. A. and Tokarski, III, J. T. and Sanders, G. D. and Kuhns, P. L. and McGill, S. A. and Reyes, A. P. and Reno, J. L. and Stanton, C. J. and Bowers, C. R.},
abstractNote = {A combined experimental-theoretical study of optically pumped NMR (OPNMR) has been performed in a GaAs/Al0.1Ga0.9As quantum well film with thermally induced biaxial strain. The photon energy dependence of the Ga-71 OPNMR signal was recorded at magnetic fields of 4.9 and 9.4 T at a temperature of 4.8-5.4 K. The data were compared to the nuclear spin polarization calculated from differential absorption to spin-up and spin-down states of the conduction band using a modified Pidgeon Brown model. Reasonable agreement between theory and experiment is obtained, facilitating assignment of features in the OPNMR energy dependence to specific interband transitions. Despite the approximations made in the quantum-mechanical model and the inexact correspondence between the experimental and calculated observables, the results provide insight into how effects of strain and quantum confinement are manifested in OPNMR signals},
doi = {10.1103/PhysRevB.90.155317},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 15,
volume = 90,
place = {United States},
year = {Wed Oct 29 00:00:00 EDT 2014},
month = {Wed Oct 29 00:00:00 EDT 2014}
}
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https://doi.org/10.1103/PhysRevB.90.155317
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    Works referencing / citing this record:

    Interband and intraband relaxation dynamics in InSb based quantum wells
    journal, December 2016

    • Bhowmick, M.; Khodaparast, G. A.; Mishima, T. D.
    • Journal of Applied Physics, Vol. 120, Issue 23
    • DOI: 10.1063/1.4971347
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