Atomic fermi gas in the trimerized kagome lattice at 2/3 filling

被引：28

作者：

Damski, B

Everts, HU

Honecker, A

Fehrmann, H

Santos, L

Lewenstein, M

机构：

[1] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

[2] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland

[3] Tech Univ Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany

[4] Univ Stuttgart, Inst Theoret Phys 3, D-70550 Stuttgart, Germany

[5] ICFO, E-08034 Barcelona, Spain

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.95.060403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study low temperature properties of a spinless interacting Fermi gas in the trimerized kagome 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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页数：4

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