Abstract
Carbon-13 nuclear magnetic resonance (${}^{13}$C NMR) measurements have been carried out in the quasi-one-dimensional organic conductor (TMTTF)${}_{2}$SbF${}_{6}$, which exhibits charge ordering (CO) transition and antiferromagnetic (AF) transition at 157 K and 6 K at ambient pressure, respectively. We estimated the degree of charge disproportionation, $\ensuremath{\Delta}\ensuremath{\rho}={\ensuremath{\rho}}_{\mathrm{rich}}\ensuremath{-}{\ensuremath{\rho}}_{\mathrm{poor}}$, in the CO state to be 0.25$e$ from the analysis of the NMR shift and found the broadening of the NMR spectral peaks caused by the inhomogeneous distribution in association with the AF fluctuation at charge rich site below 20 K in the CO state. Moreover, we determined the magnetic structure with two kinds of staggered moments in the AF phase of (TMTTF)${}_{2}$SbF${}_{6}$, which suggests that the CO state remains even in the AF phase. Consequently, we found the difference between two AF phases appearing on both sides of the spin-Peierls phase in the universal $P\ensuremath{-}T$ phase diagram.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.