Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Vadim B. Geshkenbein"'
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033098 (2023)
Dissipation-free current transport in type II superconductors requires vortices, the topological defects of the superfluid, to be pinned by defects in the underlying material. The pinning capacity of a defect is quantified by the Labusch parameter κ
Externí odkaz:
https://doaj.org/article/9f2bccb341f24b83881e498026c23d8b
Publikováno v:
Physical Review Research, Vol 4, Iss 1, p 013143 (2022)
Applying the strong pinning formalism to the mixed state of a type-II superconductor, we study the effect of thermal fluctuations (or creep) on the penetration of an ac magnetic field as quantified by the so-called Campbell length λ_{C}. Within stro
Externí odkaz:
https://doaj.org/article/465aa8f25c894ee092ae11ad3fa26bb5
Publikováno v:
Physical Review Research, 2 (4)
Type II superconductors exhibit a fascinating phenomenology that is determined by the dynamical properties of the vortex matter hosted by the material. A crucial element in this phenomenology is vortex pinning by material defects, e.g., immobilizing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62e558b575e8f5a14a9016f1417b9c96
Autor:
Surajit Dutta, Pratap Raychaudhuri, Evay Y. Andrei, Zhili Xiao, Gianni Blatter, Martin Buchacek, Vadim B. Geshkenbein
Publikováno v:
Physical Review B. 100
Pinning and creep determine the current--voltage characteristic of a type II superconductor and thereby its potential for technological applications. The recent development of strong pinning theory provides us with a tool to assess a superconductor's
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df4b275a0b5f889d035a3ee090dd60e6
https://doi.org/10.1103/physrevb.100.224502
https://doi.org/10.1103/physrevb.100.224502
We study thermal effects on pinning and creep in type-II superconductors where vortices interact with a low density ${n}_{p}$ of strong pointlike defects with pinning energy ${e}_{p}$ and extension $\ensuremath{\xi}$, the vortex core size. Defects ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af13503167ecb24bb0735543d1483599
Publikováno v:
Physical Review B. 98
Pinning and thermal creep determine the response of numerous systems containing superstructures, e.g., vortices in type II superconductors, domain walls in ferroics, or dislocations in metals. The combination of drive and thermal fluctuations leads t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f6099ff4a9d05fffc748f5f4361881f
https://doi.org/10.1103/physrevb.98.094510
https://doi.org/10.1103/physrevb.98.094510
We study effects of pinning on the dynamics of a vortex lattice in a type II superconductor in the strong-pinning situation and determine the force--velocity (or current--voltage) characteristic combining analytical and numerical methods. Our analysi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7212f912cb7559d1cbc6ea8c25a9a9fa
http://arxiv.org/abs/1709.03369
http://arxiv.org/abs/1709.03369
Publikováno v:
Journal of Experimental and Theoretical Physics. 117:570-578
We study the random directed polymer problem—the short-scale behavior of an elastic string (or polymer) in one transverse dimension subject to a disorder potential and finite temperature fluctuations. We are interested in the polymer short-scale wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77d28bb6aeb4cfce084f58c79dd87177
https://doi.org/10.1134/s1063776113110022
https://doi.org/10.1134/s1063776113110022
Publikováno v:
Physica C: Superconductivity and its Applications. 468:705-708
We report on a complex zero-temperature decay channel of a classical object in a metastable state coupled to a quantum degree of freedom. This setting can be realized in a dc-SQUID where both Josephson-junctions have identical critical currents I_c b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::533aeae83c94fb733ad7d349bb3c2427
https://doi.org/10.1016/j.physc.2007.11.034
https://doi.org/10.1016/j.physc.2007.11.034
Publikováno v:
Physical Review B. 92
The penetration of an $ac$ magnetic signal into a type II superconductor residing in the Shubnikov phase depends on the pinning properties of Abrikosov vortices. Within a phenomenological theory, the so-called Campbell penetration depth $\lambda_{\rm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50544b10b9467ec941c17bf50b72ded5
https://doi.org/10.1103/physrevb.92.134501
https://doi.org/10.1103/physrevb.92.134501