Magnetoconductivity of a metal with closed Fermi surface reconstructed by a biaxial density wave

Abstract

We investigate quantum dynamics and kinetics of a 2D conductor with closed Fermi surface reconstructed by a biaxial density wave, in which electrons move along a two-dimensional periodic net of semiclassical trajectories coupled by the magnetic breakdown tunnelling under a strong magnetic field. We derive a quasi-particle dispersion law and magnetoconductivity tensor. The quasi-particle spectrum is found to be the alternating series of two-dimensional magnetic energy bands with gaps between them. The longitudinal magnetoconductivity shows giant oscillations with change of magnetic field, while the Hall coefficient changes sign and is absent in a wide range of the magnetic fields in between. Preliminary estimations show that the suggested magnetoconductivity mechanism may be the origin of such behaviour of the Hall coefficient vs. magnetic field, as observed in experiments in materials with analogous topology of the Fermi surface, such as the high-Tc superconducting cuprates.

arXiv comment11 pages, 4 figures

References in corpus (8)

• Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
• Change of carrier density at the pseudogap critical point of a cuprate superconductor
• Magnetic oscillations in a two-dimensional network of compensated electron and hole orbits
• Topological instability of two-dimensional conductors
• Magnetic field reveals vanishing Hall response in the normal state of stripe-ordered cuprates
• Peierls-type structural phase transition in a crystal induced by magnetic breakdown
• Density wave and topological reconstruction of an isotropic two-dimensional electron band in external magnetic field
• Onset of pseudogap and density wave in a system with a closed Fermi surface

Cited by in corpus (1)

• DC and optical signatures of the topological reconstruction of the Fermi surface for electrons with parabolic band dispersion