Nuclear spin cooling by helicity-alternated optical pumping at weak magnetic fields in n -GaAs

P. S. Sokolov, M. Yu Petrov, K. V. Kavokin, A. S. Kurdyubov, M. S. Kuznetsova, R. V. Cherbunin, S. Yu Verbin, N. K. Poletaev, D. R. Yakovlev, D. Suter, M. Bayer

Research output

4 Citations (Scopus)

Abstract

The spin dynamics of localized donor-bound electrons interacting with the nuclear spin ensemble in n-doped GaAs epilayers is studied using nuclear spin polarization by light with modulated circular polarization. We show that the observed buildup of the nuclear spin polarization is a result of competition between nuclear spin cooling and nuclear spin warmup in the oscillating Knight field. The developed model allows us to explain the dependence of nuclear spin polarization on the modulation frequency and to estimate the equilibration time of the nuclear spin system that appears to be shorter than the transverse relaxation time T2 determined from nuclear magnetic resonance.

Original languageEnglish
Article number205205
JournalPhysical Review B
Volume96
Issue number20
DOIs
Publication statusPublished - 28 Nov 2017

Fingerprint

Optical pumping
Spin polarization
optical pumping
nuclear spin
Magnetic fields
Cooling
cooling
magnetic fields
Spin dynamics
Circular polarization
Epilayers
Frequency modulation
Relaxation time
Nuclear magnetic resonance
polarization
Electrons
spin dynamics
circular polarization
gallium arsenide
frequency modulation

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

@article{2b8c392d64ba40b0a61a696aea7b5a59,
title = "Nuclear spin cooling by helicity-alternated optical pumping at weak magnetic fields in n -GaAs",
abstract = "The spin dynamics of localized donor-bound electrons interacting with the nuclear spin ensemble in n-doped GaAs epilayers is studied using nuclear spin polarization by light with modulated circular polarization. We show that the observed buildup of the nuclear spin polarization is a result of competition between nuclear spin cooling and nuclear spin warmup in the oscillating Knight field. The developed model allows us to explain the dependence of nuclear spin polarization on the modulation frequency and to estimate the equilibration time of the nuclear spin system that appears to be shorter than the transverse relaxation time T2 determined from nuclear magnetic resonance.",
author = "Sokolov, {P. S.} and Petrov, {M. Yu} and Kavokin, {K. V.} and Kurdyubov, {A. S.} and Kuznetsova, {M. S.} and Cherbunin, {R. V.} and Verbin, {S. Yu} and Poletaev, {N. K.} and Yakovlev, {D. R.} and D. Suter and M. Bayer",
year = "2017",
month = "11",
day = "28",
doi = "10.1103/PhysRevB.96.205205",
language = "English",
volume = "96",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "20",

}

Nuclear spin cooling by helicity-alternated optical pumping at weak magnetic fields in n -GaAs. / Sokolov, P. S.; Petrov, M. Yu; Kavokin, K. V.; Kurdyubov, A. S.; Kuznetsova, M. S.; Cherbunin, R. V.; Verbin, S. Yu; Poletaev, N. K.; Yakovlev, D. R.; Suter, D.; Bayer, M.

In: Physical Review B, Vol. 96, No. 20, 205205, 28.11.2017.

Research output

TY - JOUR

T1 - Nuclear spin cooling by helicity-alternated optical pumping at weak magnetic fields in n -GaAs

AU - Sokolov, P. S.

AU - Petrov, M. Yu

AU - Kavokin, K. V.

AU - Kurdyubov, A. S.

AU - Kuznetsova, M. S.

AU - Cherbunin, R. V.

AU - Verbin, S. Yu

AU - Poletaev, N. K.

AU - Yakovlev, D. R.

AU - Suter, D.

AU - Bayer, M.

PY - 2017/11/28

Y1 - 2017/11/28

N2 - The spin dynamics of localized donor-bound electrons interacting with the nuclear spin ensemble in n-doped GaAs epilayers is studied using nuclear spin polarization by light with modulated circular polarization. We show that the observed buildup of the nuclear spin polarization is a result of competition between nuclear spin cooling and nuclear spin warmup in the oscillating Knight field. The developed model allows us to explain the dependence of nuclear spin polarization on the modulation frequency and to estimate the equilibration time of the nuclear spin system that appears to be shorter than the transverse relaxation time T2 determined from nuclear magnetic resonance.

AB - The spin dynamics of localized donor-bound electrons interacting with the nuclear spin ensemble in n-doped GaAs epilayers is studied using nuclear spin polarization by light with modulated circular polarization. We show that the observed buildup of the nuclear spin polarization is a result of competition between nuclear spin cooling and nuclear spin warmup in the oscillating Knight field. The developed model allows us to explain the dependence of nuclear spin polarization on the modulation frequency and to estimate the equilibration time of the nuclear spin system that appears to be shorter than the transverse relaxation time T2 determined from nuclear magnetic resonance.

UR - http://www.scopus.com/inward/record.url?scp=85039942918&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.96.205205

DO - 10.1103/PhysRevB.96.205205

M3 - Article

AN - SCOPUS:85039942918

VL - 96

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 20

M1 - 205205

ER -