A quantum-mechanical model of quasi-one-dimensional conductors

Conference item

We present a model of a quasi-one-dimensional (Q1D) conductor with weak dispersion in the direction perpendicular to the chains in a magnetic field. Finite-energy electric dipole transitions between the eigenstates of the system constitute Fermi-surface traversal resonance, a Q1D analogue of cyclotron resonance. We extend the model to describe a (TMTSF)(2)X-like material, with dispersion in two directions perpendicular to the chains, and find that for certain orientations of the magnetic field large degeneracies occur between the magnetic-field induced states. These are angles at which maxima are observed experimentally in the d.c. conductivity, and thus we explain one class of angle-dependent magnetoresistance oscillations (AMRO) in terms of zero-energy electric dipole transitions between magnetic-field induced states.

Authors: Ardavan, A; Singleton, J; Blundell, S

• Publication status: Published
• Journal: SYNTHETIC METALS
• Volume: 120
• Issue: 1-3
• Pages: 1009-1010
• Publication date: 2001-03-15
• Event title: 16th International Conference on Science and Technology of Synthetic Metals (ICSM 2000)
• DOI: 10.1016/S0379-6779(00)01478-8
• ISSN: 0379-6779
• Keywords: AMRO; models; (TMTSF)(2)X; conductivity