Supertransport by Superclimbing Dislocations in He-4: When All Dimensions Matter

Kuklov, Anatoly B.; Pollet, Lode; Prokof'ev, Nikolay V. und Svistunov, Boris (2022): Supertransport by Superclimbing Dislocations in He-4: When All Dimensions Matter. In: Physical Review Letters, Bd. 128, Nr. 25, 255301

Abstract

The unique superflow-through-solid effect observed in solid 4He and attributed to the quasi-onedimensional 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0031-9007
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390814868