Staggered flux state and charge order in a 2-leg triangular ladder system

Authors: Pan, L.¹; An, J.²; Gong, C.²

Source: The European Physical Journal B - Condensed Matter, Volume 65, Number 2, September 2008 , pp. 191-194(4)

Publisher: Springer

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Abstract:

Based on the t-J-V 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.

Keywords: 74.20.Mn Nonconventional mechanisms; 71.10.Fd Lattice fermion models; 71.10.Hf Non-Fermiliquid ground states, electron p; 71.10.Pm Fermions in reduced dimensions

Document Type: Research article

DOI: http://dx.doi.org/10.1140/epjb/e2008-00351-2

Affiliations: 1: National Laboratory of Solid State Microstructure and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China, Email: dtlhpan@yahoo.com.cn 2: National Laboratory of Solid State Microstructure and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China

Publication date: 2008-09-01