Competing Ground States of a Peierls-Hubbard Nanotube

Details Competing Ground States of a Peierls-Hubbard Nanotube Competing Ground States of a Peierls-Hubbard Nanotube

2009-07-25

arxiv.org/abs/0907.4407v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 4 figures. to be published in Europhys. Lett. 87 (2009) 17006

Scientific paper

Motivated by iodo platinum complexes assembled within a quadratic-prism lattice, [Pt(C$_2$H$_8$N$_2$)(C$_{10}$H$_8$N$_2$)I]$_4$(NO$_3$)$_8$, we investigate the ground-state properties of a Peierls-Hubbard four-legged tube. Making a group-theoretical analysis, we systematically reveal a variety of valence arrangements, including half-metallic charge-density-wave states. Quantum and thermal phase competition is numerically demonstrated with particular emphasis on doping-induced successive insulator-to-metal transitions with conductivity increasing stepwise.

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