Electronic band structure of alfa-(Per)2M(mnt)2 compounds

Details Electronic band structure of alfa-(Per)2M(mnt)2 compounds Electronic band structure of alfa-(Per)2M(mnt)2 compounds

2004-11-26

arxiv.org/abs/cond-mat/0411676v2

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, including 4 figures. Accepted for publication in European Physical Journal B

Scientific paper

10.1140/epjb/e2005-00001-3

The band structure of alfa-(Per)2M(mnt)2, leads to a description of these materials as nearly perfectly one dimensional conductors. The conduction is mainly along the stacking direction of the partially oxidized perylene molecules, (Per)1/2+, with virtually no interchain bandwidth. However, recent high magnetic field experiments suggest orbital coupling of the magnetic field to the electronic structure, indicating a finite interchain bandwidth. The details of the band structure and the possible variances, at low energies, from a perfect one dimensional system are examined. In particular, multiple quasi-one dimensional Fermi surface sheets, which would become important at low temperatures, may lead to an explanation for the experimental finding of a magnetic field induced high field charge density wave ground state. Experimental tests to observe the effects of the finite interchain bandwidth are proposed.

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