Underlying Mechanism for the Giant Isochoric Compressibility of Solid 4He: Superclimb of Dislocations

Authors

S Söyler
A Kuklov
L Pollet
Nikolai Prokof'ev, University of Massachusetts - AmherstFollow
Boris Svistunov, University of Massachusetts - AmherstFollow

Publication Date

2009

Journal or Book Title

Physics Review Letters

Abstract

In the experiment on superfluid transport in solid 4He [Phys. Rev. Lett. 100, 235301 (2008)], Ray and Hallock observed an anomalously large isochoric compressibility: the supersolid samples demonstrated a significant and apparently spatially uniform response of density and pressure to chemical potential, applied locally through Vycor “electrodes.” We propose that the effect is due to superclimb: edge dislocations can climb because of mass transport along superfluid cores. We corroborate the scenario by ab initio simulations of an edge dislocation in solid 4He at T=0.5  K. We argue that at low temperature the effect must be suppressed due to a crossover to the smooth dislocation.

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://prl.aps.org/abstract/PRL/v103/i17/e175301

Volume

103

Issue

17

Recommended Citation

Söyler, S; Kuklov, A; Pollet, L; Prokof'ev, Nikolai; and Svistunov, Boris, "Underlying Mechanism for the Giant Isochoric Compressibility of Solid 4He: Superclimb of Dislocations" (2009). Physics Review Letters. 1160.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1160