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<p>The origin of the temperature-dependent physical properties of η-Mo<sub>4</sub>O<sub>11</sub> has been a topic discussed for a couple of decades. By using a photoelectron momentum microscope, we measured the Fermi surfaces and band structures of this material at 150&#xa0;K, 70&#xa0;K, and 20&#xa0;K, i.e., above, between, and below the temperatures where two charge density wave (CDW) transitions were reported to occur in the literature. Three metallic Fermi surfaces with 1D character along the <i>b</i><sup><i>*</i></sup> and <i>b</i><sup>*</sup> ± <i>c</i><sup>*</sup> axes were clearly observed at these three temperatures with a negligible difference, suggesting that η-Mo<sub>4</sub>O<sub>11</sub> does not show CDW transition in the measured temperature range. No trace of CDW transition was observed in the spectra of the three metallic bands near the Fermi level as well. Based on these results and theoretical supports, we discuss the origin of the two conflicting results on the temperature-dependent physical property of η-Mo<sub>4</sub>O<sub>11</sub>.</p>

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Temperature-dependent electronic structure of a quasi-two-dimensional conductor η-Mo4O11

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月16日

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  • Takahiro Kobayashi,
  • Fumihiko Matsui,
  • Emi Iwamoto,
  • Hidetoshi Kizaki,
  • Masanobu Miyata,
  • Mikio Koyano,
  • Isamu Yamamoto,
  • Shigemasa Suga,
  • Kazuyuki Sakamoto

摘要

The origin of the temperature-dependent physical properties of η-Mo4O11 has been a topic discussed for a couple of decades. By using a photoelectron momentum microscope, we measured the Fermi surfaces and band structures of this material at 150 K, 70 K, and 20 K, i.e., above, between, and below the temperatures where two charge density wave (CDW) transitions were reported to occur in the literature. Three metallic Fermi surfaces with 1D character along the b* and b* ± c* axes were clearly observed at these three temperatures with a negligible difference, suggesting that η-Mo4O11 does not show CDW transition in the measured temperature range. No trace of CDW transition was observed in the spectra of the three metallic bands near the Fermi level as well. Based on these results and theoretical supports, we discuss the origin of the two conflicting results on the temperature-dependent physical property of η-Mo4O11.