Magnetic oscillations and field induced spin density waves in (TMTSF)_2ClO_4

TL;DR

This paper investigates how magnetic fields influence spin density waves in a quasi-one-dimensional organic conductor, revealing field-induced phase transitions and oscillations consistent with experimental observations.

Contribution

It provides an exact solution for the one-particle problem and predicts magnetic field-induced SDW phase transitions and oscillations in (TMTSF)_2ClO_4.

Findings

Predicted a first-order transition between SDW phases induced by magnetic field.

Reproduced 260 Tesla oscillation period observed experimentally.

Mapped the overall phase diagram of the material.

Abstract

We report an analysis of the effects of magnetic field on a quasi-one-dimensional band of interacting electrons with a transverse dimerizing potential. One-particle problem in bond-antibond representation is solved exactly. The resulting propagator is used to calculate the spin-density-wave (SDW) response of the interacting system within the matrix RPA for the SDW susceptibility. We predict the magnetic field induced transition of the first order between interband SDW_0 and intraband SDW_(+-) phases. We reproduce the rapid oscillations with a period of 260 Tesla and the overal profile of the TMTSF_2ClO_4 phase diagram.