Competing interactions in semiconductor quantum dots
Abstract
In this study, we introduce an integrability-based method enabling the study of semiconductor quantum dot models incorporating both the full hyperfine interaction as well as a mean-field treatment of dipole-dipole interactions in the nuclear spin bath. By performing free induction decay and spin echo simulations we characterize the combined effect of both types of interactions on the decoherence of the electron spin, for external fields ranging from low to high values. We show that for spin echo simulations the hyperfine interaction is the dominant source of decoherence at short times for low fields, and competes with the dipole-dipole interactions at longer times. On the contrary, at high fields the main source of decay is due to the dipole-dipole interactions. In the latter regime an asymmetry in the echo is observed. Furthermore, the non-decaying fraction previously observed for zero field free induction decay simulations in quantum dots with only hyperfine interactions, is destroyed for longer times by the mean-field treatment of the dipolar interactions.
- Authors:
-
- Univ. of Amsterdam, Amsterdam (The Netherlands)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1182476
- Alternate Identifier(s):
- OSTI ID: 1180031
- Report Number(s):
- BNL-107234-2014-JA; BNL-107234-2014-JAAM
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: PO015; KC0202030
- Grant/Contract Number:
- AC02-98CH10886
- 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
van den Berg, R., Brandino, G. P., El Araby, O., Konik, R. M., Gritsev, V., and Caux, J. -S. Competing interactions in semiconductor quantum dots. United States: N. p., 2014.
Web. doi:10.1103/PhysRevB.90.155117.
van den Berg, R., Brandino, G. P., El Araby, O., Konik, R. M., Gritsev, V., & Caux, J. -S. Competing interactions in semiconductor quantum dots. United States. https://doi.org/10.1103/PhysRevB.90.155117
van den Berg, R., Brandino, G. P., El Araby, O., Konik, R. M., Gritsev, V., and Caux, J. -S. Tue .
"Competing interactions in semiconductor quantum dots". United States. https://doi.org/10.1103/PhysRevB.90.155117. https://www.osti.gov/servlets/purl/1182476.
@article{osti_1182476,
title = {Competing interactions in semiconductor quantum dots},
author = {van den Berg, R. and Brandino, G. P. and El Araby, O. and Konik, R. M. and Gritsev, V. and Caux, J. -S.},
abstractNote = {In this study, we introduce an integrability-based method enabling the study of semiconductor quantum dot models incorporating both the full hyperfine interaction as well as a mean-field treatment of dipole-dipole interactions in the nuclear spin bath. By performing free induction decay and spin echo simulations we characterize the combined effect of both types of interactions on the decoherence of the electron spin, for external fields ranging from low to high values. We show that for spin echo simulations the hyperfine interaction is the dominant source of decoherence at short times for low fields, and competes with the dipole-dipole interactions at longer times. On the contrary, at high fields the main source of decay is due to the dipole-dipole interactions. In the latter regime an asymmetry in the echo is observed. Furthermore, the non-decaying fraction previously observed for zero field free induction decay simulations in quantum dots with only hyperfine interactions, is destroyed for longer times by the mean-field treatment of the dipolar interactions.},
doi = {10.1103/PhysRevB.90.155117},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 15,
volume = 90,
place = {United States},
year = {Tue Oct 14 00:00:00 EDT 2014},
month = {Tue Oct 14 00:00:00 EDT 2014}
}
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Works referencing / citing this record:
Quantum model for mode locking in pulsed semiconductor quantum dots
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