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- Title:
Charge degrees in the quarter-filled checkerboard lattice
- Document type:
- Zeitschriftenaufsatz
- Author(s):
- Pollmann, F.; Betouras, J.J.; Runge, E.; Fulde, P.
- Abstract:
- For a systematic study of charge degrees of freedom in lattices with geometric frustration, we consider spinless fermions on the checkerboard lattice with nearest-neighbor hopping and nearest-neighbor repulsion at quarter-filling. An effective Hamiltonian in the limit ⪡ is given to lowest non-vanishing order by the ring exchange (). We show that the system can equivalently be described by hard-core bosons and map the model to a confining lattice gauge theory.
- Journal title:
- Journal of Magnetism and Magnetic Materials 2007-03
- Year:
- 2007
- Journal volume:
- 310
- Journal issue:
- 2
- Pages contribution:
- 966-968
- Fulltext / DOI:
- doi:10.1016/j.jmmm.2006.10.348
- Publisher:
- Elsevier BV
- E-ISSN:
- 0304-8853
- Date of publication:
- 01.03.2007
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