Charge ordering in quasi-one-dimensional systems with frustrating interactions

Details Charge ordering in quasi-one-dimensional systems with frustrating interactions Charge ordering in quasi-one-dimensional systems with frustrating interactions

2005-11-18

arxiv.org/abs/cond-mat/0511458v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 Pages, 3 Figures

Scientific paper

Motivated by the co-existing charge and spin order found in strongly correlated ladder systems, we study an effective pseudospin model on a coupled two-leg ladder. A bosonisation analysis yields a rich phase diagram showing Wigner/Peierls charge order and Neel/dimer spin order. In a broad parameter regime, the orbital antiferromagnetic phase is found to be stable. An intermediate gapless phase of finite width is found to lie in between two charge-ordered gapped phases. Our work is potentially relevant for a unified description of a class of strongly correlated, quarter-filled ladder systems.

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