Collective Spin-Density-Wave Response Perpendicular to the Chains of the Quasi One-Dimensional Conductor (TMTSF)2PF6

TL;DR

This study investigates the anisotropic collective spin-density-wave response in (TMTSF)$_2$PF$_6$, revealing sliding behavior in perpendicular directions and providing insights into the condensate's transport properties.

Contribution

It demonstrates the presence of collective transport and sliding density waves in multiple directions, challenging typical quasi-one-dimensional models.

Findings

Pinned mode resonance along a and b' axes

Density wave slides in the perpendicular b' direction

Absence of collective response along c* direction

Abstract

Microwave experiments along all three directions of the spin-density-wave model compound (TMTSF)$_2$PF$_6$ reveal that the pinned mode resonance is present along the $a$ and $b^{\prime}$ axes. The collective transport is considered to be the fingerprint of the condensate. In contrast to common quasi one-dimensional models, the density wave also slides in the perpendicular $b^{\prime}$ direction. The collective response is absent along the least conducting $c^*$ direction.