Co-operative density wave and giant spin gap in the quarter-filled zigzag ladder

Details Co-operative density wave and giant spin gap in the quarter-filled zigzag ladder Co-operative density wave and giant spin gap in the quarter-filled zigzag ladder

2004-06-22

arxiv.org/abs/cond-mat/0406525v2

Phys. Rev. Lett. 94, 207206 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 EPS figures. accepted in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.94.207206

Strong co-operative interactions occur between four different broken symmetries involving charge-ordering and bond distortions in the quarter-filled correlated zigzag electron ladder. The ground state is singlet, with spin gap several times larger than in the spin-Peierls state of the one-dimensional quarter-filled chain with the same parameters. We propose the quarter-filled zigzag electron ladder model for several different organic charge-transfer solids with coupled pairs of quasi-one-dimensional stacks, the spin-gap transition temperatures in which are unusually high.

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