Atomic Fermi gas in the trimerized kagomé lattice at 2/3 filling.
We study low temperature properties of a spinless interacting Fermi gas in the trimerized kagomé lattice. The case of two fermions per trimer is described by a quantum spin 1/2 model on the triangular lattice with couplings depending on the bond directions. Using exact diagonalizations we show that the system exhibits nonstandard properties of a quantum spin-liquid crystal, combining a planar antiferromagnetic order with an exceptionally large number of low-energy excitations.
Damski
B
B
Institut für Theoretische Physik, Universität Hannover, Appelstrasse 2, D-30167 Hannover, Germany.
Everts
H-U
HU
Honecker
A
A
Fehrmann
H
H
Santos
L
L
Lewenstein
M
M