Effects of Electron Correlation near Spin-Density-Wave on Angle Dependence of Magnetoconductivity

TL;DR

This study explores how electron correlation influences the angle dependence of magnetoconductivity in quasi-one-dimensional organic conductors, highlighting the roles of quasi-particle lifetime and velocity near the SDW.

Contribution

It reveals the distinct impacts of quasi-particle lifetime and velocity on magnetoconductivity's angle dependence, emphasizing the role of electron correlation effects.

Findings

Quasi-particle lifetime mainly affects the axis magnetoconductivity.

Velocity changes due to electron correlation influence interchain magnetoconductivity.

Electron correlation effects are linked to Fermi surface orbital momentum dependences.

Abstract

The effect of electron correlation on the angle dependence of magnetoconductivity is studied in quasi-one-dimensional organic conductors. We investigated the effect on the basis of the momentum dependence of both quasi-particle's lifetime and velocity near the spin-density-wave (SDW). We found that the momentum dependence of quasi-particle's lifetime mainly governs the angle dependence of one-dimensional axis magnetoconductivity. On the other hand, the change in velocity originating from the electron correlation gives the dominant effects on the angle dependence of the interchain axis magnetoconductivity. The effect of electron correlation is clarified from the association of the momentum dependences of lifetime and velocity with the momentum dependences of commensurate orbitals on a Fermi surface in magnetic fields.