Zobrazeno 1 - 10
of 2 398
pro vyhledávání: '"A. Kavokin"'
Autor:
Cao, Junhui, Kavokin, Alexey
The BCS theory has achieved widespread success in describing conventional superconductivity. However, when the length scale reaches the atomic limit, the reduced dimensionality may lead to the quantum breakdown resulting in unpredictable superconduct
Externí odkaz:
http://arxiv.org/abs/2409.12201
We experimentally observe harmonic oscillations in a bosonic condensate of exciton-polaritons confined within an elliptical trap. These oscillations arise from quantum beats between two size-quantized states of the condensate, split in energy due to
Externí odkaz:
http://arxiv.org/abs/2407.12429
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
The Seebeck effect consists in the induction of a voltage drop due to the temperature difference in a conductor. In the middle of XIXth century, Lord Kelvin has proposed a relation between the Seebeck coefficient and the derivative of the chemical po
Externí odkaz:
http://arxiv.org/abs/2405.10807
Autor:
Kudlacik, Dennis, Kopteva, Nataliia E., Kotur, Mladen, Yakovlev, Dmitri R., Kavokin, Kirill V., Harkort, Carolin, Karzel, Marek, Zhukov, Evgeny A., Evers, Eiko, Belykh, Vasilii V., Bayer, Manfred
Optical orientation of carrier spins by circularly polarized light is the basic concept and tool of spin physics in semiconductors. We study the optical orientation of electrons and holes in a crystal of the FA$_{0.9}$Cs$_{0.1}$PbI$_{2.8}$Br$_{0.2}$
Externí odkaz:
http://arxiv.org/abs/2404.05369
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
Autor:
Gribakin, Boris F., Litvyak, Valentina M., Kotur, Mladen, André, Regis, Vladimirova, Maria, Yakovlev, Dmitri R., Kavokin, Kirill V.
The nuclear spin systems in CdTe/(Cd,Zn)Te and CdTe/(Cd,Mg)Te quantum wells (QW) are studied using a multistage technique combining optical pumping and Hanle effect-based detection. The samples demonstrate drastically different nuclear spin dynamics
Externí odkaz:
http://arxiv.org/abs/2402.17435
Well-known Mott's formula links the thermoelectric power characterised by Seebeck coefficient to conductivity. We calculate analytically the thermoelectric current and Seebeck coefficient in one-dimensional systems and show that, while the prediction
Externí odkaz:
http://arxiv.org/abs/2401.03721
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033187 (2021)
Open-dissipative systems obeying parity-time (PT) symmetry are capable of demonstrating oscillatory dynamics akin to the conservative systems. In contrast to limit cycle solutions characteristic of nonlinear systems, the PT-symmetric oscillations for
Externí odkaz:
https://doaj.org/article/bb9a77f658454057a00d5d82fb63b950
Autor:
Cao, Junhui, Kavokin, Alexey
The experimental results hinting at the room temperature and ambient pressure superconductivity and magnetic levitation in LK-99 attracted an unprecedented interest. While attempts of other teams to reproduce the reported observations on similar samp
Externí odkaz:
http://arxiv.org/abs/2310.09305