Experimental signatures of a Kitaev quantum spin liquid in α-RuCl3
日程 :
2020年7月16日(木) 10:30 am - 12:00 pm
場所 :
https://sites.google.com/view/cevis2020/registration (We will send the zoom link to the registered participants)
講師 : Takasada Shibauchi 所属 : University of Tokyo 世話人 : 押川正毅 (ex.63275)
e-mail: oshikawa@issp.u-tokyo.ac.jp
e-mail: oshikawa@issp.u-tokyo.ac.jp
In this presentation I will show our recent results of thermal conductivity and specific heat measurements in the high-field paramagnetic state of Kitaev material α-RuCl3. The field dependence of thermal Hall conductivity shows a plateau behavior with the value close to one half of quantized thermal Hall effect of electron systems [1], whose sign changes with field angle as expected from the Chern number in the Kitaev model [2]. The most recent specific heat measurements provide thermodynamic evidence for field-angle dependent Majorana gap, which demonstrates the bulk-edge correspondence in a Kitaev quantum spin liquid.
[1] Y. Kasahara et al., Nature 559, 227-231 (2018).[2] T. Yokoi et al., arXiv:2001.01899.
Chair: Yuki Motome
備考 : This event is jointly organized by the Korea Institute for Advanced Study and the University of Tokyo. “Correlated Electrons Virtual International Seminars (CEVIS)” https://sites.google.com/view/cevis2020/home
(公開日: 2020年07月13日)