Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Kochev, A. D."'
Modeling the motion of ultracold neutrons (UCNs) is crucial for assessing their losses, accurately measuring their lifetime, and describing other experiments. In material traps, it is necessary to account not only for specular but also for diffuse el
Externí odkaz:
http://arxiv.org/abs/2412.05106
Publikováno v:
Bull. Russ. Acad. Sci. Phys. 88, 1472-1477 (2024)
A film of liquid helium on the surface of material traps for ultracold neutrons protects the neutrons from being absorbed by the trap walls. By using surface roughness and an electrostatic field, it is possible to maintain a helium film of sufficient
Externí odkaz:
http://arxiv.org/abs/2411.19645
Autor:
Grigoriev, Pavel D., Kochev, Vladislav D., Tsyplukhin, Victor A., Dyugaev, Alexander M., Polishchuk, Ilya Ya.
The most accurate neutron lifetime measurements now use the material or magnetic traps of ultracold neutrons (UCN). The precision of these experiments is determined by the accuracy of estimating the neutron loss rate. In material UCN traps the main s
Externí odkaz:
http://arxiv.org/abs/2407.03207
Publikováno v:
Magnetochemistry 2023, 9(7), 173
Most high-$T_c$ superconductors are spatially inhomogeneous. Usually, this heterogeneity originates from the interplay of various types of electronic ordering. It affects various superconducting properties, such as the transition temperature, the mag
Externí odkaz:
http://arxiv.org/abs/2305.14510
Publikováno v:
Phys. Rev. B 108, 125123 (2023)
The interplay between superconductivity (SC) and spin/charge density wave (DW) in organic metals shows many similarities to high-$T_c$ superconductors. It also contains many puzzles, for example, the anisotropic SC onset observed and the severalfold
Externí odkaz:
http://arxiv.org/abs/2305.06957
Publikováno v:
Phys. Rev. C 108 (2023) 025501
To increase the storage time of ultracold neutrons (UCN) inside the material traps it is promising to cover the trap walls by liquid 4He, the material which does not absorb neutrons at all. A rough side wall of UCN trap holds the required amount of 4
Externí odkaz:
http://arxiv.org/abs/2303.04429
Publikováno v:
Materials 2023, 16(5), 1840
Heterogeneous superconductivity onset is a common phenomenon in high-$T_c$ superconductors of both the cuprate and iron-based families. It is manifested by a fairly wide transition from the metallic to zero-resistance state. Usually, in these strongl
Externí odkaz:
http://arxiv.org/abs/2301.06185
We discuss an analytical model to calculate the superconducting volume ratio. Apart from this, our model can also predict the shape of embedded superconducting domains. We applied our model to calculate the superconducting volume ratios and shape of
Externí odkaz:
http://arxiv.org/abs/2209.07085
Publikováno v:
Crystals 2021, 11(1), 72
In highly anisotropic organic superconductor (TMTSF)$_2$ClO$_4$, superconducting (SC) phase coexists with metallic and spin density wave phases in the form of domains. Using the Maxwell-Garnett approximation (MGA), we calculate the volume ratio and e
Externí odkaz:
http://arxiv.org/abs/2012.03231
Publikováno v:
Phys. Rev. B 103, 014519 (2021)
We study the coexistence of superconductivity (SC) and density-wave state and reconcile various puzzling experimental data in organic superconductors (TMTSF)$_{2}$PF$_{6}$ and (TMTSF)$_{2}$ClO$_{4}$. The anisotropic resistance drop above $T_c$ is qua
Externí odkaz:
http://arxiv.org/abs/2007.14388