Two-phonon absorption spectra in the layered honeycomb compound α-RuCl3

Yoshinao Hasegawa, Takuya Aoyama, Koya Sasaki, Yuka Ikemoto, Taro Moriwaki, Toshiya Shirakura, Riichiro Saito, Yoshinori Imai, Kenya Ohgushi

研究成果: Article査読

11 被引用数 (Scopus)


We performed infrared absorption spectroscopy for α-RuCl3 with a two-dimensional honeycomb lattice of Ru3+ ions. In the mid-infrared range, we observed three absorption peaks corresponding to intra-atomic d–d transitions among Ru3+ ions in accordance with a previous report. In the far-infrared range, we observed conspicuous broad absorption structures near 600 cm−1 in addition to several sharp single phonon peaks. Our first-principles calculations for the isolate sandwich model together with the factor group analysis revealed that the peak structures near 600 cm−1 are absorptions related to a two-phonon process. Our results stimulate further study on the spin–lattice coupling in α-RuCl3 as well as the optical detection of Majorana excitations in Kitaev spin liquids.

ジャーナルjournal of the physical society of japan
出版ステータスPublished - 2017 12月 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)


「Two-phonon absorption spectra in the layered honeycomb compound α-RuCl3」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。