Landau quantization effects in the charge-density-wave system (Per)${}_{2}M$(mnt)${}_2$ (where $M=$Au and Pt)

Abstract

A finite transfer integral $t_a$ orthogonal to the conducting chains of a highly one-dimensional metal gives rise to empty and filled bands that simulate an indirect-gap semiconductor upon formation of a commensurate charge-density-wave (CDW). In contrast to semiconductors such as Ge and Si with bandgaps $\sim 1$ eV, the CDW system possesses an indirect gap with a greatly reduced energy scale, enabling moderate laboratory magnetic fields to have a major effect. The consequent variation of the thermodynamic gap with magnetic field due to Zeeman splitting and Landau quantization enables the electronic bandstructure parameters (transfer integrals, Fermi velocity) to be determined accurately. These parameters reveal the orbital quantization limit to be reached at $\sim 20$ T in (Per)${}_{2}M$(mnt)${}_2$ salts, making them highly unlikely candidates for a recently-proposed cascade of field-induced charge-density wave states.

References in corpus (5)

• High magnetic field induced charge density wave states in a quasi-one dimensional organic conductor
• Suppression of a charge density wave ground state in high magnetic fields: spin and orbital mechanisms
• Orbital quantization in the high magnetic field state of a charge-density-wave system
• Charge-density Waves Survive the Pauli Paramagnetic Limit
• Magnetoresistance in the SDW state of (TMTSF)2PF6 above T*~4K; Novel effect due to the Landau quantization

Cited by in corpus (4)

• Soliton Wall Superlattice in Quasi-One-Dimensional Conductor (Per)2Pt(mnt)2
• Generalized susceptibility of quasi-one dimensional system with periodic potential: model for the organic superconductor (TMTSF)${}_2$ClO${}_4$
• Soliton Wall Superlattice Charge-Density-Wave Phase in Quasi-One-Dimensional Conductor (Per)${}_2$Pt(mnt)${}_2$
• Recent high-magnetic-field studies of unusual groundstates in quasi-two-dimensional crystalline organic metals and superconductors