Aleksa Bjeliš

Phase diagram for charge-density waves in a magnetic field

The influence of an external magnetic field on a quasi-one-dimensional system with a charge-density wave (CDW) instability is treated within the random-phase approximation which includes both CDW and spin-density wave correlations. We show that the CDW is sensitive to both orbital and Pauli effects of the field. In the case of perfect nesting, the critical temperature decreases monotonically with the field, and the wave vector of the instability starts to shift above some critical value of magnetic field. Depending on the ratio between the spin and charge coupling constants and on the direction of the applied magnetic field, the wave-vector shift is either parallel (

Crystal stability and optical properties of organic chain compounds

{\mathrm{CDW}}_{\mathit{x}}

Photoemission properties of quasi-one-dimensional conductors

order) or perpendicular (

Spectral properties of quasi-one-dimensional conductors with a finite transverse band dispersion

{\mathrm{CDW}}_{\mathit{y}}

New SDW phases in quasi-one-dimensional systems dimerized in the transverse direction

order) to the most conducting direction. The

Dielectric properties of multiband electron systems I. Tight-binding formulation

{\mathrm{CDW}}_{\mathit{x}}

The tight-binding approach to the dielectric response in the multiband systems

order is a field-dependent linear combination of the charge- and spin-density waves and is sensible only to the Pauli effect. The wave-vector shift in

Dielectric properties of multiband electron systems II. Collective modes

{\mathrm{CDW}}_{\mathit{y}}

Peierls-type structural phase transition in a crystal induced by magnetic breakdown

depends on the interchain coupling, but the critical temperature does not. This order is affected by the confinement of the electronic orbits. By increasing the relative strength of the orbital effect with respect to the Pauli effect, one can destroy the

Landau model for commensurate-commensurate phase transitions in uniaxial improper ferroelectric crystals

{\mathrm{CDW}}_{\mathit{y}}