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 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.
Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1.
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M
Boninsegni
A B
AB
Kuklov
L
L
Pollet
N V
NV
Prokof'ev
B V
BV
Svistunov
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Troyer