Spin density wave in the strongly dimerized quasi-one-dimensional organic conductor (DMET-TTF) 2AuBr2
نویسندگان
چکیده
At ambient pressure, studies of resistivity, magnetic susceptibility, and carbon-13 nuclear resonance (NMR) were conducted on the quasi-one-dimensional organic conductor ${(\text{DMET-}\mathrm{TTF})}_{2}{\mathrm{AuBr}}_{2}$. Resistivity measurements showed a broad minimum at approximately 160 K, insulator behavior below this temperature susceptibility results revealed dip structure 22 K. same temperature, sharp peak in dependence ${T}_{1}^{\ensuremath{-}1}$ associated with antiferromagnetic (AFM). transition was found, along drastic splitting NMR spectra, indicating commensurate AFM structure. The amplitude moments determined to be $0.06{\ensuremath{\mu}}_{B}$/molecule from hyperfine coupling constant tensor angular internal field phase. small moment signifies nesting type, i.e., spin density wave. An ordering $(\ensuremath{\uparrow}\ensuremath{\uparrow}\ensuremath{\downarrow}\ensuremath{\downarrow})$ one-dimensional chain is expected $2{k}_{\mathrm{F}}$ instability. This can explained by strong dimerization DMET-TTF chain.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevb.104.184409