Cooperative density wave and giant spin gap in the quarter-filled zigzag electron ladder

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Strong cooperative 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, in which the spin-gap transition temperatures are unusually high.

Original languageEnglish (US)
JournalPhysical Review Letters
Issue number20
Publication statusPublished - May 27 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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