Origin of Rapid Oscillations in Low Dimensional (TMTSF)2PF6

TL;DR

This study investigates the origin of rapid oscillations in (TMTSF)2PF6, revealing that they arise from quantized 2D metallic pockets in the FISDW phase, which disappear at lower temperatures due to depopulation of delocalized states.

Contribution

The paper demonstrates that rapid oscillations originate from quantized metallic pockets in the FISDW phase, clarifying their physical origin in this low-dimensional material.

Findings

Fermi surface is not fully gapped in the FISDW phase

RO arises from quantized 2D metallic pockets

RO disappears at lower temperatures due to depopulation

Abstract

In order to clarify the origin of the "Rapid Oscillation" (RO) in (TMTSF)2PF6, we studied the magnetoresistance anisotropy in the Field Induced Spin Density Wave (FISDW) phase. We have found that in the FISDW insulating state, the Fermi surface is not totally gapped; the remaining 2D metallic pockets are quantized in magnetic field and give rise to the RO. Decreasing temperature does not change the size and orientation of the closed pockets, rather, it causes depopulation of the delocalized states in favor of the localized ones, resulting in the disappearance of the RO.