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<p>Since the prediction of a Kitaev interaction–induced quantum spin liquid state, <i>α</i>-RuCl<sub>3</sub>—a honeycomb lattice material with an effective spin of <i>S</i><sub>eff</sub>=1/2—has emerged as a leading candidate for realizing the Kitaev quantum spin liquid. Although extensive thermal and magnetic studies have been carried out on bulk <i>α</i>-RuCl<sub>3</sub>, experimental investigations on thin films remain scarce. Here, we fabricated nonlocal Pt/<i>α</i>-RuCl<sub>3</sub> heterostructures to probe thermal and spin current transport in <i>α</i>-RuCl<sub>3</sub> thin flakes. A thermal current deflection in <i>α</i>-RuCl<sub>3</sub> is observed using the Nernst effect signal of Pt electrodes. Furthermore, the antiferromagnetic phase boundary is identified from thermal spin current signals. Our results establish an effective approach to accessing thermal and spin properties in layered quantum spin liquid candidates.</p>

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Thermoelectricity and spin caloritronics in the Pt/α-RuCl3 heterostructure

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Linhao Jia,
  • Di Chen,
  • Bingcheng Luo,
  • Shaomian Qi,
  • Yuxin Zhai,
  • Shiqiang Liu,
  • Zhongchen Xu,
  • Quanliang Zhu,
  • Guijuan Liu,
  • Shaobo Liu,
  • Yingqi Wang,
  • Yuanjun Song,
  • Jiankun Li,
  • Ryuichi Namba,
  • Kumpei Imamura,
  • Kenichiro Hashimoto,
  • Takasada Shibauchi,
  • Qihua Xiong,
  • Youguo Shi,
  • Y. Matsuda,
  • X. C. Xie,
  • Jian-Hao Chen

摘要

Since the prediction of a Kitaev interaction–induced quantum spin liquid state, α-RuCl3—a honeycomb lattice material with an effective spin of Seff=1/2—has emerged as a leading candidate for realizing the Kitaev quantum spin liquid. Although extensive thermal and magnetic studies have been carried out on bulk α-RuCl3, experimental investigations on thin films remain scarce. Here, we fabricated nonlocal Pt/α-RuCl3 heterostructures to probe thermal and spin current transport in α-RuCl3 thin flakes. A thermal current deflection in α-RuCl3 is observed using the Nernst effect signal of Pt electrodes. Furthermore, the antiferromagnetic phase boundary is identified from thermal spin current signals. Our results establish an effective approach to accessing thermal and spin properties in layered quantum spin liquid candidates.