26 citations · 58 across the 8 of their papers we have counts for
8 papers
Optical cooling of nuclear spins in GaAs/(Al,Ga)As quantum wells at subkelvin temperatures: Evidence of the dynamic self-polarization of nuclear spins
M. Kotur, D. Kudlacik, N. E. Kopteva +4
We investigate the dynamic polarization of nuclear spins in a nominally undoped GaAs/AlGaAs quantum well using two complementary experimental approaches: time-res…
Deep optical cooling of coupled nuclear spin-spin and quadrupole reservoirs in a GaAs/(Al,Ga)As quantum well
M. Kotur, D. O. Tolmachev, V. M. Litvyak +4
The selective cooling of As spins by optical pumping followed by adiabatic demagnetization in the rotating frame is realized in a nominally undoped GaAs/(Al,Ga)As quantum we…
Single-beam resonant spin amplification of electrons interacting with nuclei in a GaAs/(Al,Ga)As quantum well
M. Kotur, F. Saeed, R. W. Mocek +6
The dynamic polarization of nuclear spins interacting with resident electrons under resonant excitation of trions is studied in a nominally undoped GaAs/(Al,Ga)As quantum well. Unl…
Nuclear spin-lattice relaxation in p-type GaAs
M. Kotur, R. I. Dzhioev, M. Vladimirova +6
Spin-lattice relaxation of the nuclear spin system in p-type GaAs is studied using a three-stage experimental protocol including optical pumping and measuring the difference of the…
High-efficiency optical pumping of nuclear polarization in a GaAs quantum well
R. W. Mocek, V. L. Korenev, M. Bayer +6
The dynamic polarization of nuclear spins by photoexcited electrons is studied in a high quality GaAs/AlGaAs quantum well. We find a surprisingly high efficiency of the spin transf…
Nuclear spin relaxation in n-GaAs: from insulating to metallic regime
M. Vladimirova, S. Cronenberger, D. Scalbert +7
Nuclear spin relaxation is studied in n-GaAs thick layers and microcavity samples with different electron densities. We reveal that both in metallic samples where electrons are fre…
Nuclear spin warm-up in bulk n-GaAs
M. Kotur, R. I. Dzhioev, M. Vladimirova +3
We show that the spin-lattice relaxation in n-type insulating GaAs is dramatically accelerated at low magnetic fields. The origin of this effect, that cannot be explained in terms…
Diffusive motion of particles and dimers over anisotropic lattices
Marcin Mińkowski, Magdalena A. Załuska Kotur
Behavior of the mixture of particles and dimers moving with different jump rates at reconstructed surfaces is described. Collective diffusion coefficient is calculated by the varia…