Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains. (13th December 2012)

• Record Type: Journal Article
• Authors: Dressel, M.; Dumm, M.; Knoblauch, T.; Köhler, B.; Salameh, B.; Yasin, S.
• Other Names: Carbone Fabrizio Academic Editor.
• Is Part Of: Advances in condensed matter physics. Volume 2012(2012)
• Publication Date: 2012-12-13
• Subjects: Condensed matter -- Periodicals; Condensed matter; Periodicals; 530.41
• DOI: 10.1155/2012/398721
• Languages: English
• ISSNs: 1687-8124

Abstract

Abstract : Charge order affects most of the electronic properties but is believed not to alter the spin arrangement since the magnetic susceptibility remains unchanged. We present electron-spin-resonance experiments on quasi-one-dimensional ( TMTTF ) 2 X salts (X = PF6, AsF6, and SbF6 ), which reveal that the magnetic properties are modified below T C O when electronic ferroelectricity sets in. The coupling of anions and organic molecules rotates the g-tensor out of the molecular plane creating magnetically nonequivalent sites on neighboring chains at domain walls. Due to anisotropic Zeeman interaction a novel magnetic interaction mechanism in the charge-ordered state is observed as a doubling of the rotational periodicity of Δ H .