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

TL;DR

This paper investigates the electronic band structure of alfa-(Per)2M(mnt)2 compounds, revealing their near-one-dimensional conduction and exploring how interchain interactions influence their low-energy electronic properties and magnetic field responses.

Contribution

It provides a detailed analysis of the band structure, highlighting the effects of finite interchain bandwidth and proposing experimental tests for these effects.

Findings

Materials are nearly perfect 1D conductors with minimal interchain bandwidth.

Multiple quasi-1D Fermi surface sheets may explain magnetic field-induced charge density waves.

Finite interchain bandwidth influences low-energy electronic behavior.

Abstract

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.