Can a Magnetic Field Destroy a Spin-Density-Wave Phase in a Quasi-One-Dimensional Conductor?

TL;DR

This paper investigates how high magnetic fields can destroy the Spin-Density-Wave phase in quasi-one-dimensional conductors by inducing an anti-nesting effect, challenging previous assumptions about SDW robustness.

Contribution

It demonstrates that magnetic fields can induce anti-nesting in Q1D conductors, leading to SDW phase destruction, a novel insight into magnetic effects on low-dimensional electron systems.

Findings

High magnetic fields generate anti-nesting terms in Q1D spectra.

Magnetic fields can destroy SDW phases in real Q1D conductors.

Proposes experimental verification in organic conductors like (TMTSF)$_2$X.

Abstract

It is known that, in a pure one-dimensional case, Charge-Density-Wave (CDW) phase is destroyed by a magnetic field, whereas Spin-Density-Wave (SDW) one does not feel the field. In reality, SDW phase is often observed in quasi-one-dimensional (Q1D) conductors due to the so-called "nesting" property of their electron spectra. We show that, in the latter case, a high magnetic field generates some "anti-nesting" term in a Q1D electron spectrum, which destroys SDW phase. We suggest to perform the corresponding experiments in SDW phases of the real Q1D organic conductors with chemical formula (TMTSF)$_2$X (X=PF$_6$, ClO$_4$, etc.).