https://doi.org/10.1140/epjb/e2008-00351-2
Staggered flux state and charge order in a 2-leg triangular ladder system
1
National Laboratory of Solid State Microstructure and
Department of Physics, Nanjing University, Nanjing 210093, P.R. China
2
Complexity Science Centre, Yangzhou University, Yangzhou 225002, P.R.
China
Corresponding author: a dtlhpan@yahoo.com.cn
Received:
2
April
2008
Revised:
5
June
2008
Published online:
17
September
2008
Based on the 
model, the possibility of the
staggered flux(SF) state in a 2-leg triangular ladder system at
1/4 filling has been studied by investigating the staggered
current-current correlations. We found that the amplitude of
rung-rung staggered current correlations decays exponentially with a
correlation length 2–3 lattice spacing. The short-range SF state
becomes more stable when increasing V and becomes most stable in
the vicinity of charge instability point of the system. Over the
critical V value, the system becomes charge ordered.
PACS: 74.20.Mn – Nonconventional mechanisms / 71.10.Fd – Lattice fermion models / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 71.10.Pm – Fermions in reduced dimensions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
