High-Pressure Synthesis of a Massive and Non-Symmorphic Dirac Semimetal Candidate MoP₄
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説明
Single crystal and polycrystalline samples of MoP$_4$ with a black-phosphorus-derived structure have been successfully synthesized by a high-pressure technique. The polycrystalline samples show a large positive magnetoresistance and a small negative Seebeck coefficient at low temperatures, reflecting a semi-metallic nature with high-mobility electrons. Consistent with the transport properties, the band structure calculation reveals a semi-metallic state with the presence of two types of Dirac nodes slightly below the Fermi level. The Dirac node along the $��$-X direction normal to the phosphorus layers is gapped out in the presence of spin-orbit coupling (SOC), whereas the band crossing at the Z-point is immune to SOC because of the non-symmorphic symmetry. This work demonstrates a great potential of phosphorus-based layered Zintl compounds for topological semimetal candidates allowing chemical band engineering.
14 pages, 4 figures, 2 tables
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 90 (12), 1-, 2021-12
Tokyo : Physical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1520573331288566144
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- NII論文ID
- 210000159469
- 40022774039
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- NII書誌ID
- AA00704814
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- ISSN
- 00319015
- 13474073
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- NDL書誌ID
- 031868921
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- 本文言語コード
- en
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- 資料種別
- journal article
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- NDL 雑誌分類
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- ZM35(科学技術--物理学)
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- NDLサーチ
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