Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains

Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains

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 magnet...

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Main Authors: M. Dressel, M. Dumm, T. Knoblauch, B. Köhler, B. Salameh, S. Yasin
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:Advances in Condensed Matter Physics
Online Access:http://dx.doi.org/10.1155/2012/398721
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spelling doaj-b5c2e31e656a46b0ac77720d710024df2020-11-24T20:52:49ZengHindawi LimitedAdvances in Condensed Matter Physics1687-81081687-81242012-01-01201210.1155/2012/398721398721Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin ChainsM. Dressel0M. Dumm1T. Knoblauch2B. Köhler3B. Salameh4S. Yasin51. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, GermanyCharge 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.http://dx.doi.org/10.1155/2012/398721
collection DOAJ
language English
format Article
sources DOAJ
author M. Dressel
M. Dumm
T. Knoblauch
B. Köhler
B. Salameh
S. Yasin
spellingShingle M. Dressel
M. Dumm
T. Knoblauch
B. Köhler
B. Salameh
S. Yasin
Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
Advances in Condensed Matter Physics
author_facet M. Dressel
M. Dumm
T. Knoblauch
B. Köhler
B. Salameh
S. Yasin
author_sort M. Dressel
title Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
title_short Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
title_full Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
title_fullStr Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
title_full_unstemmed Charge Order Breaks Magnetic Symmetry in Molecular Quantum Spin Chains
title_sort charge order breaks magnetic symmetry in molecular quantum spin chains
publisher Hindawi Limited
series Advances in Condensed Matter Physics
issn 1687-8108
1687-8124
publishDate 2012-01-01
description 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.
url http://dx.doi.org/10.1155/2012/398721
work_keys_str_mv AT mdressel chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
AT mdumm chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
AT tknoblauch chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
AT bkohler chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
AT bsalameh chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
AT syasin chargeorderbreaksmagneticsymmetryinmolecularquantumspinchains
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