Superlattice Induced by Charge Order in the Organic Spin Chain (TMTTF)${}_{2}X$ ($X=$ SbF${}_6$, AsF${}_6$ and PF${}_6$) Revealed by High Field EPR

Abstract

We have investigated the charge ordering phase of the quasi one dimensional quantum antiferromagnet (TMTTF)${}_{2}X$ ($X=$ SbF${}_6$, AsF${}_6$ and PF${}_6$) using high fields/frequencies electron paramagnetic resonance. In addition to the uniform displacement of the counter anions involved in the charge order phase, we report the existence of a superlattice between the spin chains in the direction $c$, caused by the space modulation of the charge order. When the field is high enough, the magnetic decoupling of the spin chains allows us to estimate the interaction between the chains, $J_c<1$~mK, three orders of magnitude lower than expected from the mean field theory.

References in corpus (13)

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• Magnetism and Charge ordering in TMTTF${}_2$-PF${}_6$ organic crystals

Cited by in corpus (2)

• Electron spins interaction in the spin-Peierls phase of the organic spin chain (o -DMTTF) 2 X (X = Cl, Br, I)
• Charge-order phase transition in the quasi one-dimensional organic conductor (TMTTF)${}_2$NO${}_3$