Zobrazeno 1 - 10
of 211
pro vyhledávání: '"Kavokin, K. V."'
Autor:
Smirnov, D. S., Kavokin, K. V.
The concept of nuclear spin temperature has been a cornerstone of the theory of dynamic nuclear spin polarization by electrons in various semiconductor structures for decades. Still, it is not always applicable to strongly localized electrons due to
Externí odkaz:
http://arxiv.org/abs/2406.08296
Nuclear magnetic resonance (NMR) is particularly relevant for studies of internuclear spin coupling at zero and ultra-low fields (ZULF), where spin-spin interactions dominate over Zeeman ones. Here we report on ZULF NMR in CdTe. In this semiconductor
Externí odkaz:
http://arxiv.org/abs/2403.17593
At low lattice temperatures the nuclear spins in a solid form a closed thermodynamic system that is well isolated from the lattice. Thermodynamic properties of the nuclear spin system are characterized by the local field of spin-spin interactions, wh
Externí odkaz:
http://arxiv.org/abs/2305.18912
Autor:
Godejohann, F., Akhmadullin, R. R., Kavokin, K. V., Yakovlev, D. R., Akimov, I. A., Namozov, B. R., Kusrayev, Yu. G., Karczewski, G., Wojtowicz, T., Bayer, M.
A trion magnetic polaron formed by the exchange interaction of a positively charged exciton (trion) with localized spins of Mn$^{2+}$ ions is found experimentally in a 4\,nm wide Cd$_{0.98}$Mn$_{0.02}$Te/Cd$_{0.78}$Mn$_{0.02}$Mg$_{0.2}$Te quantum wel
Externí odkaz:
http://arxiv.org/abs/2208.05943
Autor:
Rittmann, C., Petrov, M. Yu., Kamenskii, A. N., Kavokin, K. V., Kuntsevich, A. Yu., Efimov, Yu. P., Eliseev, S. A., Bayer, M., Greilich, A.
We discuss the implications of a small indium content (3%) in a GaAs epilayer on the electron- and nuclear-spin relaxation due to enhanced quadrupolar effects induced by the strain. Using the weakly perturbative spin-noise spectroscopy, we study the
Externí odkaz:
http://arxiv.org/abs/2206.13177
Autor:
Vladimirova, M., Cronenberger, S., Colombier, A., Scalbert, D., Litvyak, V. M., Kavokin, K. V., Lemaître, A.
Heat capacity of the nuclear spin system (NSS) in GaAs-based microstructures has been shown to be much greater than expected from dipolar coupling between nuclei, thus limiting the efficiency of NSS cooling by adiabatic demagnetization. It was sugges
Externí odkaz:
http://arxiv.org/abs/2112.02957
Autor:
Litvyak, V. M., Cherbunin, R. V., Kalevich, V. K., Lihachev, A. I., Nashchekin, A. V., Vladimirova, M., Kavokin, K. V.
The efficiency of the adiabatic demagnetization of nuclear spin system (NSS) of a solid is limited, if quadrupole effects are present. Nevertheless, despite a considerable quadrupole interaction, recent experiments validated the thermodynamic descrip
Externí odkaz:
http://arxiv.org/abs/2105.03972
Publikováno v:
Phys. Rev. B 103, 205207 (2021)
Nuclear magnetism in n-doped semiconductors with positive hyperfine constant is revisited. Two kinds of nuclear magnetic ordering can be induced by resident electrons in a deeply cooled nuclear spin system. At positive nuclear spin temperature below
Externí odkaz:
http://arxiv.org/abs/2103.01120
Autor:
Kotur, M., Tolmachev, D. O., Litvyak, V. M., Kavokin, K. V., Suter, D., Yakovlev, D. R., Bayer, M.
The selective cooling of $^{75}$As spins by optical pumping followed by adiabatic demagnetization in the rotating frame is realized in a nominally undoped GaAs/(Al,Ga)As quantum well. The rotation of 6 kG strong Overhauser field at the $^{75}$As Larm
Externí odkaz:
http://arxiv.org/abs/2102.04153
Autor:
Kavokin, K. V.
Publikováno v:
Phys. Rev. B 102, 195417 (2020)
A theory is developed of the time-dependent magnetization of the metacrystal composed of magnetoferritin macromolecules. Such superstructures, comprising up to several millions of superparamagnetic nanoparticles encapsulated in protein shells, can be
Externí odkaz:
http://arxiv.org/abs/2009.06235