Breakthrough in the study of frustrated ferro-antiferromagnets A2Cu2Mo3O12 (A = Rb, Cs)
e-mail: firstname.lastname@example.org講演言語 : 日本語
Linear-chain molybdate A2Cu2Mo3O12 (A = Rb, Cs) is one of the most intriguing linear frustrated ferro-antiferromagnets . For over a decade extensive experimental and theoretical work focused on the unique magnetoelectric effect in Rb2Cu2Mo3O12 , and on spin-nematic Tomonaga-Luttinger liquid behavior in Cs2Cu2Mo3O12 . Unfortunately, a lack of single-crystal samples has hampered any further progress.
In this talk, I will present our recent thermodynamic study using single-crystal samples, which have been grown in our group. The single-crystal study of both materials revealed that their magnetic and dielectric properties are even more complex and intriguing than originally thought [4,5,6]. Our comprehensive thermodynamic measurements mapped out the highly anisotropic low-temperature magnetic phase diagram for both materials [4,6]. Dielectric experiments revealed the Rb system to be a quantum multiferroic and enabled the first direct excitation-response measurements of critical susceptibility at a magnetic BEC quantum critical point . For the Cs system, a host of exotic field-induced phases was discovered, including a presaturation phase that is likely to be a spin-nematic phase .
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