Luttinger liquid in the core of a screw dislocation in helium-4

On the basis of first-principles Monte Carlo simulations we find that the screw dislocation along the hexagonal axis of an hcp 4He crystal features a superfluid (at T-->0) core. This is the first example of a regular quasi-one-dimensional supersolid--the phase featuring both translational and sup...

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Veröffentlicht in:	Physical review letters 2007-07, Vol.99 (3), p.035301-035301, Article 035301
Hauptverfasser:	Boninsegni, M, Kuklov, A B, Pollet, L, Prokof'ev, N V, Svistunov, B V, Troyer, M
Format:	Artikel
Sprache:	eng
Schlagworte:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMPUTERIZED SIMULATION CRYSTALS HCP LATTICES HELIUM 4 HYDROGEN LIQUIDS MATERIALS SCIENCE MONTE CARLO METHOD ONE-DIMENSIONAL CALCULATIONS SCREW DISLOCATIONS SOLIDS SUPERFLUIDITY
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container_issue	3
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container_title	Physical review letters
container_volume	99
creator	Boninsegni, M Kuklov, A B Pollet, L Prokof'ev, N V Svistunov, B V Troyer, M
description	On the basis of first-principles Monte Carlo simulations we find that the screw dislocation along the hexagonal axis of an hcp 4He crystal features a superfluid (at T-->0) core. This is the first example of a regular quasi-one-dimensional supersolid--the phase featuring both translational and superfluid orders, and one of the cleanest cases of a Luttinger-liquid system. In contrast, the same type of screw dislocation in solid H2 is insulating.
doi_str_mv	10.1103/physrevlett.99.035301
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subjects	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMPUTERIZED SIMULATION CRYSTALS HCP LATTICES HELIUM 4 HYDROGEN LIQUIDS MATERIALS SCIENCE MONTE CARLO METHOD ONE-DIMENSIONAL CALCULATIONS SCREW DISLOCATIONS SOLIDS SUPERFLUIDITY
title	Luttinger liquid in the core of a screw dislocation in helium-4
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