TY - JOUR
T1 - Optically Induced Nuclear Spin Polarization in the Quantum Hall Regime
T2 - The Effect of Electron Spin Polarization through Exciton and Trion Excitations
AU - Akiba, K.
AU - Kanasugi, S.
AU - Yuge, T.
AU - Nagase, K.
AU - Hirayama, Y.
N1 - Publisher Copyright:
© 2015 American Physical Society. © 2015 American Physical Society.
PY - 2015/7/8
Y1 - 2015/7/8
N2 - We study nuclear spin polarization in the quantum Hall regime through the optically pumped electron spin polarization in the lowest Landau level. The nuclear spin polarization is measured as a nuclear magnetic field BN by means of the sensitive resistive detection. We find the dependence of BN on the filling factor nonmonotonic. The comprehensive measurements of BN with the help of the circularly polarized photoluminescence measurements indicate the participation of the photoexcited complexes, i.e., the exciton and trion (charged exciton), in nuclear spin polarization. On the basis of a novel estimation method of the equilibrium electron spin polarization, we analyze the experimental data and conclude that the filling factor dependence of BN is understood by the effect of electron spin polarization through excitons and trions.
AB - We study nuclear spin polarization in the quantum Hall regime through the optically pumped electron spin polarization in the lowest Landau level. The nuclear spin polarization is measured as a nuclear magnetic field BN by means of the sensitive resistive detection. We find the dependence of BN on the filling factor nonmonotonic. The comprehensive measurements of BN with the help of the circularly polarized photoluminescence measurements indicate the participation of the photoexcited complexes, i.e., the exciton and trion (charged exciton), in nuclear spin polarization. On the basis of a novel estimation method of the equilibrium electron spin polarization, we analyze the experimental data and conclude that the filling factor dependence of BN is understood by the effect of electron spin polarization through excitons and trions.
UR - http://www.scopus.com/inward/record.url?scp=84937951804&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84937951804&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.115.026804
DO - 10.1103/PhysRevLett.115.026804
M3 - Article
AN - SCOPUS:84937951804
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 2
M1 - 026804
ER -