Comment on the article “The Peierls transition in a magnetic field for the two-chain organic conductor (Perylene)2[Pt(S₂C₂(CN)₂)₂]”

¹ Departamento de Química, Instituto Tecnológico e Nuclear P-2686 Sacavém Codex, Portugal
² Departamento de Física, Universidade Nova de Lisboa, P-2825, Monte de Caparica, Portugal

Received: 3 June 1996
Accepted: 8 October 1996

Abstract

In a recent letter [1], the magnetic-field dependence of the metal-insulator (MI) transition temperature in the compound was presented and was found in agreement (Fig. 1) with the theoretical prediction for the Peierls transition temperature, , obtained by Dieterich and Fulde [2]: 
 
where is the digamma-function. For low fields , this gives a B²-dependence [2,3]: 

The authors used this agreement to simultaneously validate two different assertions: equation (1) describes well the magnetic-field dependence of the Peierls transition temperature and the transition occurring in this compound is driven only by the electron-phonon interaction (Peierls transition). In this comment, we would like to show that equation (1) is not completely satisfactory and that the MI transition mechanism involved in this compound is more complicated than claimed by the authors.