Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains

Autor: M. Dressel, M. Dumm, T. Knoblauch, B. Köhler, B. Salameh, S. Yasin
Jazyk: angličtina
Rok vydání: 2012
Předmět:
Zdroj: Advances in Condensed Matter Physics, Vol 2012 (2012)
Druh dokumentu: article
ISSN: 1687-8108
1687-8124
DOI: 10.1155/2012/398721
Popis: 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)2X salts (X= PF6, AsF6, and SbF6), which reveal that the magnetic properties are modified below TCO 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 ΔH.
Databáze: Directory of Open Access Journals
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