Journal or Book Title
Physics Review Letters
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.
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.
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