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