https://doi.org/10.1140/epjb/e2005-00001-3
Electronic band structure of α-(Per)2M(mnt)2 compounds
1
Institut de Ciència de Materials de Barcelona, (CSIC), Campus
Universitari de Bellaterra, 08193 Bellaterra, Spain
2
Instituto Tecnológico e Nuclear / CFMCUL, Estrada Nacional
n 10, P-2686-953 Sacavém, Portugal
3
NHMFL/Physics, Florida State University, Tallahassee Florida, 32310,
USA
Corresponding author: a malmeida@itn.pt
Received:
16
August
2004
Revised:
15
November
2004
Published online:
18
January
2005
The band structure of α-(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.
PACS: 71.18.+y – Fermi surface: calculations and measurements; effective mass, g factor / 71.20.Rv – Polymers and organic compounds
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004