Atomic Fermi gas in the trimerized kagomé lattice at 2/3 filling.
نویسندگان
چکیده
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.
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عنوان ژورنال:
- Physical review letters
دوره 95 6 شماره
صفحات -
تاریخ انتشار 2005