Scholarlink

<p>Topological nodal-line semimetals (TNLSMs) are characterized by symmetry-protected nodal lines in momentum space, which can be classified as accidental or essential depending on their formation mechanisms. Accidental nodal lines have been experimentally observed in various momentum positions, whereas the essential ones were all found at the Brillouin zone boundary. By using laser-based angle-resolved photoemission spectroscopy, we observed a nodal line located away from the Brillouin zone boundary in a topological material TaNiTe<sub>5</sub>. Symmetry analysis confirms that the Dirac-like band crossings are of an essential type protected by the nonsymmorphic symmetry. Our findings reveal a new configuration of essential nodal lines and may facilitate the discovery of more TNLSMs with similar crystalline symmetries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nonsymmorphic symmetry-protected Dirac nodal line away from the Brillouin zone boundary in TaNiTe5

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月13日

查看全文
  • Rong Feng,
  • Qi Lu,
  • Haotian Zheng,
  • Xunqing Yin,
  • Weidong Luo,
  • Chunqiang Xu,
  • Wen-He Jiao,
  • Xiaofeng Xu,
  • Wentao Zhang,
  • Dong Qian

摘要

Topological nodal-line semimetals (TNLSMs) are characterized by symmetry-protected nodal lines in momentum space, which can be classified as accidental or essential depending on their formation mechanisms. Accidental nodal lines have been experimentally observed in various momentum positions, whereas the essential ones were all found at the Brillouin zone boundary. By using laser-based angle-resolved photoemission spectroscopy, we observed a nodal line located away from the Brillouin zone boundary in a topological material TaNiTe5. Symmetry analysis confirms that the Dirac-like band crossings are of an essential type protected by the nonsymmorphic symmetry. Our findings reveal a new configuration of essential nodal lines and may facilitate the discovery of more TNLSMs with similar crystalline symmetries.