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Phys. Rev. Lett. 99, 035301 (2007) [4 pages]

Luttinger Liquid in the Core of a Screw Dislocation in Helium-4

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M. Boninsegni1, A. B. Kuklov2, L. Pollet3, N. V. Prokof’ev4,5, B. V. Svistunov4,5, and M. Troyer3
1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1
2Department of Engineering Science and Physics, CUNY, Staten Island, New York 10314, USA
3Theoretische Physik, ETH Zürich, CH-8093 Zürich, Switzerland
4Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA
5Russian Research Center “Kurchatov Institute,” 123182 Moscow, Russia

Received 21 May 2007; published 19 July 2007

See accompanying Physics Focus

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.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.035301
DOI:
10.1103/PhysRevLett.99.035301
PACS:
67.40.Kh, 05.30.Jp, 67.90.+z, 75.10.Jm
 
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