Dissipation effects in superconducting heterostructures with tungsten nanorods as weak links
DOI:
https://doi.org/10.1063/1.5024546Ключові слова:
Josephson junction, weak link, quasi-one-dimensional transport, phase-slip events, microwave irradiation.Анотація
Thin-film hybrid heterostructures formed by superconducting molybdenum-rhenium-alloy films with a critical temperature of about 9 K and nanoscale silicon-based semiconducting interlayers with metallic tungsten nanorods have been fabricated and studied. Current-voltage characteristics of the junctions were measured at 4.2 K and under influence of 11 GHz microwave irradiation. The evidence of a quasi-one-dimensional transport through the tungsten weak links disrupted by phase-slip centers was revealed in MoRe/doped Si/MoRe trilayers under irradiation by a high-frequency field. Also, measured current-voltage characteristics of five-layer MoRe/doped Si/MoRe/doped Si/MoRe devices exhibit a strong influence of a dissipation state in the MoRe interlayer. Namely, the switching from a superconducting state with low dissipation to a finite-conductance regime can be initiated by the emergence of an extra phase-slip center in the MoRe interlayer. Possible physical mechanisms of the two findings are discussed.Завантаження
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Опубліковано
2018-01-23
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Shaternik, V.; Shapovalov, A.; Suvorov, O.; Zhitlukhina, E.; Belogolovskii, M.; Febvre, P.; Kordyuk, A. Dissipation Effects in Superconducting Heterostructures With Tungsten Nanorods As Weak Links. Fiz. Nizk. Temp. 2018, 44, 332-337.
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