Study of multiple coupling between the spin, charge, and lattice in a multiferroic organic charge-transfer salt k-(BEDT-TTF)2Cu[N(CN)2]Cl
Quasi-2D organic charge-transfer salts k-(BEDT-TTF)2Cu2(CN)3 has been in the focus of recent scientific attention as a candidate for a quantum spin liquid. After the discovery of a relaxor-like dielectric response in k-(BEDT-TTF)2Cu2(CN)3 and ferroelectricity in k-(BEDT-TTF)2Cu[N(CN)2]Cl, these compounds have gained further attentions as a new class of ferroelectrics of purely electronic origin. Since k-(BEDT-TTF)2Cu[N(CN)2]Cl shows long-ranged ferroelectric order and antiferromagnetic order simultaneously, it is an ideal system to study the coupling between the spin, charge, and lattice degrees of freedom. Here, we propose a neutron scattering experiment on deuterated single crystals of k-(BEDT-TTF)2Cu[N(CN)2]Cl in order to search for phonon anomalies coupled with electronic ferroelectricity.
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MATSUURA Masato; BOEHM Martin; GATI Elena; HARTMANN Benedikt; KOBAYASHI Ryota; KUROSU Megumi; LANG Micheal; MUELLER Jens; PIOVANO Andrea; SASAKI Takahiko; STOCKERT Oliver and WILDES Andrew. (2014). Study of multiple coupling between the spin, charge, and lattice in a multiferroic organic charge-transfer salt k-(BEDT-TTF)2Cu[N(CN)2]Cl. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-401
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