Competing ground states of metal-halide ladders

Details Competing ground states of metal-halide ladders Competing ground states of metal-halide ladders

2006-05-06

arxiv.org/abs/cond-mat/0605158v1

J. Phys. Soc. Jpn. 75 (2006) 044717

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages with 4 figures embedded

Scientific paper

10.1143/JPSJ.75.044717

Based on a symmetry argument, we investigate the ground-state properties of newly synthesized metal-halide ladder compounds (C_8_H_6_N_4_)[Pt(C_2_H_8_N_2_)X]_2_(ClO_4_)_4_ 2H_2_O (X=Cl, Br, I). Employing a fully dressed two-band Peierls-Hubbard model, we systematically reveal possible charge- or spin-ordered states. Numerical phase diagrams demonstrate a variety of competing Peierls and Mott insulators with particular emphasis on the transition between two types of mixed-valent state of Pt^II^ and Pt^IV^ driven by varying interchain hopping integrals and Coulomb interactions.

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