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Condensed Matter > Other Condensed Matter
Title: Supertransport by Superclimbing Dislocations in $^4$He: When All Dimensions Matter
(Submitted on 27 Jan 2022 (v1), last revised 14 May 2022 (this version, v2))
Abstract: The unique superflow-through-solid effect observed in solid Helium-4 and attributed to the quasi-one-dimensional superfluidity along the dislocation cores exhibits two extraordinary features: (i) an exponentially strong suppression of the flow by a moderate increase in pressure, and (ii) an unusual temperature dependence of the flow rate with no analogy to any known system and in contradiction with the standard Luttinger liquid paradigm. Based on ab initio and model simulations, we argue that the two features are closely related: Thermal fluctuations of the shape of a superclimbing edge dislocation induce large, correlated, and asymmetric stress fields acting on the superfluid core. The critical flux is most sensitive to strong rare fluctuations and hereby acquires a sharp temperature dependence observed in experiments.
Submission history
From: A. B. Kuklov [view email][v1] Thu, 27 Jan 2022 19:01:15 GMT (1250kb,D)
[v2] Sat, 14 May 2022 20:31:50 GMT (1237kb,D)
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