Zobrazeno 1 - 10
of 187
pro vyhledávání: '"Kotur, M."'
Autor:
Chabowska, M. A., Załuska-Kotur, M. A.
One technique for creating semiconductor crystals with new, desired properties involves replacing some atoms in the crystal lattice with additives - atoms of a different type. This substitution not only alters the bulk properties of the crystal but a
Externí odkaz:
http://arxiv.org/abs/2409.04084
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:
Kotur, M., Saeed, F., Mocek, R. W., Korenev, V. L., Akimov, I. A., Bhatti, A. S., Yakovlev, D. R., Suter, D., Bayer, M.
Publikováno v:
Phys. Rev. B 98, 205304 (2018)
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. Unlike in common time-resolved pump-probe techniques, we used a single be
Externí odkaz:
http://arxiv.org/abs/1809.09556
Autor:
Kotur, M., Dzhioev, R. I., Vladimirova, M., Cherbunin, R. V., Sokolov, P. S., Yakovlev, D. R., Bayer, M., Suter, D., Kavokin, K. V.
Publikováno v:
Phys. Rev. B 97, 165206 (2018)
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 nuclear spin polarization before and after a dark interval of variabl
Externí odkaz:
http://arxiv.org/abs/1802.05013
Autor:
Mocek, R. W., Korenev, V. L., Bayer, M., Kotur, M., Dzhioev, R. I., Tolmachev, D. O., Cascio, G., Kavokin, K. V., Suter, D.
Publikováno v:
Phys. Rev. B 96, 201303 (2017)
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 transfer from the electrons to the nuclei as reflected by a maximum nuclear
Externí odkaz:
http://arxiv.org/abs/1708.00053
Autor:
Vladimirova, M., Cronenberger, S., Scalbert, D., Kotur, M., Dzhioev, R. I., Ryzhov, I. I., Kozlov, G. G., Zapasskii, V. S., Lemaître, A., Kavokin, K. V.
Publikováno v:
Phys. Rev. B 95, 125312 (2017)
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 free and mobile, and in insulating samples, where electrons are localized
Externí odkaz:
http://arxiv.org/abs/1612.01699
Akademický článek
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Publikováno v:
Phys. Rev. B 94, 081201 (2016)
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 of well-known diffusion-limited hyperfine relaxation, is found in the
Externí odkaz:
http://arxiv.org/abs/1606.00143
Step bunching and macrostep formation in 1D atomistic scale model of unstable vicinal crystal growth
We devise a new 1D atomistic scale model of vicinal growth based on Cellular Automaton. In it the step motion is realized by executing the automaton rule prescribing how adatoms incorporate into the vicinal crystal. Time increases after each rule exe
Externí odkaz:
http://arxiv.org/abs/1601.07371
Autor:
Kotur, M., Guenot, D., Jimenez-Galan, A., Kroon, D., Larsen, E. W., Louisy, M., Bengtsson, S., Miranda, M., Mauritsson, J., Arnold, C. L., Canton, S. E., Gisselbrecht, M., Carette, T., Dahlstrom, J. M., Lindroth, E., Maquet, A., Argenti, L., Martin, F., L'Huillier, A.
We study the photoionization of argon atoms close to the 3s$^2$3p$^6$ $\rightarrow$ 3s$^1$3p$^6$4p $\leftrightarrow$ 3s$^2$3p$^5$ $\varepsilon \ell$, $\ell$=s,d Fano window resonance. An interferometric technique using an attosecond pulse train, i.e.
Externí odkaz:
http://arxiv.org/abs/1505.02024