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Zero-gap semiconductor to excitonic insulator transition in Ta2NiSe5

Author

Listed:
  • Y. F. Lu

    (University of Tokyo)

  • H. Kono

    (University of Tokyo)

  • T. I. Larkin

    (Max Planck Institute for Solid State Research)

  • A. W. Rost

    (Max Planck Institute for Solid State Research
    Institute for Functional Matter and Quantum Technologies, University of Stuttgart)

  • T. Takayama

    (Max Planck Institute for Solid State Research)

  • A. V. Boris

    (Max Planck Institute for Solid State Research)

  • B. Keimer

    (Max Planck Institute for Solid State Research)

  • H. Takagi

    (University of Tokyo
    Max Planck Institute for Solid State Research
    Institute for Functional Matter and Quantum Technologies, University of Stuttgart)

Abstract

The excitonic insulator is a long conjectured correlated electron phase of narrow-gap semiconductors and semimetals, driven by weakly screened electron–hole interactions. Having been proposed more than 50 years ago, conclusive experimental evidence for its existence remains elusive. Ta2NiSe5 is a narrow-gap semiconductor with a small one-electron bandgap EG of

Suggested Citation

  • Y. F. Lu & H. Kono & T. I. Larkin & A. W. Rost & T. Takayama & A. V. Boris & B. Keimer & H. Takagi, 2017. "Zero-gap semiconductor to excitonic insulator transition in Ta2NiSe5," Nature Communications, Nature, vol. 8(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14408
    DOI: 10.1038/ncomms14408
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    Cited by:

    1. Ruishi Qi & Andrew Y. Joe & Zuocheng Zhang & Yongxin Zeng & Tiancheng Zheng & Qixin Feng & Jingxu Xie & Emma Regan & Zheyu Lu & Takashi Taniguchi & Kenji Watanabe & Sefaattin Tongay & Michael F. Cromm, 2023. "Thermodynamic behavior of correlated electron-hole fluids in van der Waals heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Yuhao Ye & Jinhua Wang & Pan Nie & Huakun Zuo & Xiaokang Li & Kamran Behnia & Zengwei Zhu & Benoît Fauqué, 2024. "Tuning the BCS-BEC crossover of electron-hole pairing with pressure," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    3. Matthew D. Watson & Alex Louat & Cephise Cacho & Sungkyun Choi & Young Hee Lee & Michael Neumann & Gideok Kim, 2023. "Spectral signatures of a unique charge density wave in Ta2NiSe7," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    4. Cheng Chen & Weichen Tang & Xiang Chen & Zhibo Kang & Shuhan Ding & Kirsty Scott & Siqi Wang & Zhenglu Li & Jacob P. C. Ruff & Makoto Hashimoto & Dong-Hui Lu & Chris Jozwiak & Aaron Bostwick & Eli Rot, 2023. "Anomalous excitonic phase diagram in band-gap-tuned Ta2Ni(Se,S)5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    5. D. G. Mazzone & Y. Shen & H. Suwa & G. Fabbris & J. Yang & S.-S. Zhang & H. Miao & J. Sears & Ke Jia & Y. G. Shi & M. H. Upton & D. M. Casa & X. Liu & Jian Liu & C. D. Batista & M. P. M. Dean, 2022. "Antiferromagnetic excitonic insulator state in Sr3Ir2O7," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    6. Akihiko Ikeda & Yasuhiro H. Matsuda & Keisuke Sato & Yuto Ishii & Hironobu Sawabe & Daisuke Nakamura & Shojiro Takeyama & Joji Nasu, 2023. "Signature of spin-triplet exciton condensations in LaCoO3 at ultrahigh magnetic fields up to 600 T," Nature Communications, Nature, vol. 14(1), pages 1-6, December.
    7. Marios H. Michael & Sheikh Rubaiat Ul Haque & Lukas Windgaetter & Simone Latini & Yuan Zhang & Angel Rubio & Richard D. Averitt & Eugene Demler, 2024. "Photonic time-crystalline behaviour mediated by phonon squeezing in Ta2NiSe5," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    8. Yanze Feng & Runkun Chen & Junbo He & Liujian Qi & Yanan Zhang & Tian Sun & Xudan Zhu & Weiming Liu & Weiliang Ma & Wanfu Shen & Chunguang Hu & Xiaojuan Sun & Dabing Li & Rongjun Zhang & Peining Li & , 2023. "Visible to mid-infrared giant in-plane optical anisotropy in ternary van der Waals crystals," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    9. Mingxiu Liu & Jingxuan Wei & Liujian Qi & Junru An & Xingsi Liu & Yahui Li & Zhiming Shi & Dabing Li & Kostya S. Novoselov & Cheng-Wei Qiu & Shaojuan Li, 2024. "Photogating-assisted tunneling boosts the responsivity and speed of heterogeneous WSe2/Ta2NiSe5 photodetectors," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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