One-dimensional antiferromagnetic behavior of a chiral molecular crystal, α′-(S,S-DMBEDT-TTF)2PF6

Publication year: 2011
Source: Synthetic Metals, In Press, Corrected Proof, Available online 14 June 2011

Sara J., Krivickas , Atsushi, Ichikawa , Kazuyuki, Takahashi , Hiroyuki, Tajima , John D., Wallis , …

The synthesis, crystal and electronic structures, resistivity, magnetic susceptibility, and dielectric constant of the novel chiral crystal, α′-(S,S-DMBEDT-TTF)2PF6 [DMBEDT-TTF=dimethylbis(ethylenedithio)tetrathiafulvalene] are presented. The α′-type donor arrangement affords the one-dimensional antiferromagnetic behavior with J=−40K. The calculated band structure indicates the pseudo-one-dimensional interaction in the molecular side-by-side direction along the b-axis. The frequency-dependent dielectric constant suggests the charge disproportionation above 100K. The non-centrosymmetric space group due to the composed chiral molecules affords the possibility of piezoelectricity.

 Highlights: ► The synthesis, crystal and electronic structures, resistivity, magnetic susceptibility, and dielectric constant of the novel chiral crystal, α′-(S,S-DMBEDT-TTF)2PF6 are presented. ► The α′-type donor arrangement affords the one-dimensional antiferromagnetic behavior with J=−40K. ► The frequency-dependent dielectric constant suggests the charge disproportionation above 100K. ► The non-centrosymmetric space group due to the composed chiral molecules affords the possibility of piezoelectricity.