IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v14y2023i1d10.1038_s41467-023-36857-7.html
   My bibliography  Save this article

Signatures of the exciton gas phase and its condensation in monolayer 1T-ZrTe2

Author

Listed:
  • Yekai Song

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Chunjing Jia

    (SLAC National Accelerator Laboratory
    University of Florida)

  • Hongyu Xiong

    (SLAC National Accelerator Laboratory
    Stanford University
    Shanghai Jiao Tong University)

  • Binbin Wang

    (ShanghaiTech University)

  • Zhicheng Jiang

    (Chinese Academy of Sciences)

  • Kui Huang

    (ShanghaiTech University)

  • Jinwoong Hwang

    (Stanford University
    Lawrence Berkeley National Laboratory
    Kangwon National Univerisity)

  • Zhuojun Li

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Choongyu Hwang

    (Pusan National University)

  • Zhongkai Liu

    (ShanghaiTech University)

  • Dawei Shen

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Jonathan A. Sobota

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Patrick Kirchmann

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Jiamin Xue

    (ShanghaiTech University)

  • Thomas P. Devereaux

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Sung-Kwan Mo

    (Lawrence Berkeley National Laboratory)

  • Zhi-Xun Shen

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Shujie Tang

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

Abstract

The excitonic insulator (EI) is a Bose-Einstein condensation (BEC) of excitons bound by electron-hole interaction in a solid, which could support high-temperature BEC transition. The material realization of EI has been challenged by the difficulty of distinguishing it from a conventional charge density wave (CDW) state. In the BEC limit, the preformed exciton gas phase is a hallmark to distinguish EI from conventional CDW, yet direct experimental evidence has been lacking. Here we report a distinct correlated phase beyond the 2×2 CDW ground state emerging in monolayer 1T-ZrTe2 and its investigation by angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). The results show novel band- and energy-dependent folding behavior in a two-step process, which is the signatures of an exciton gas phase prior to its condensation into the final CDW state. Our findings provide a versatile two-dimensional platform that allows tuning of the excitonic effect.

Suggested Citation

  • Yekai Song & Chunjing Jia & Hongyu Xiong & Binbin Wang & Zhicheng Jiang & Kui Huang & Jinwoong Hwang & Zhuojun Li & Choongyu Hwang & Zhongkai Liu & Dawei Shen & Jonathan A. Sobota & Patrick Kirchmann , 2023. "Signatures of the exciton gas phase and its condensation in monolayer 1T-ZrTe2," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36857-7
    DOI: 10.1038/s41467-023-36857-7
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-023-36857-7
    File Function: Abstract
    Download Restriction: no

    File URL: https://libkey.io/10.1038/s41467-023-36857-7?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. J. P. Eisenstein & A. H. MacDonald, 2004. "Bose–Einstein condensation of excitons in bilayer electron systems," Nature, Nature, vol. 432(7018), pages 691-694, December.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Yong-Jie Xu & Guohua Cao & Qi-Yuan Li & Cheng-Long Xue & Wei-Min Zhao & Qi-Wei Wang & Li-Guo Dou & Xuan Du & Yu-Xin Meng & Yuan-Kun Wang & Yu-Hang Gao & Zhen-Yu Jia & Wei Li & Lianlian Ji & Fang-Sen L, 2024. "Realization of monolayer ZrTe5 topological insulators with wide band gaps," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Zhen Lian & Dongxue Chen & Lei Ma & Yuze Meng & Ying Su & Li Yan & Xiong Huang & Qiran Wu & Xinyue Chen & Mark Blei & Takashi Taniguchi & Kenji Watanabe & Sefaattin Tongay & Chuanwei Zhang & Yong-Tao , 2023. "Quadrupolar excitons and hybridized interlayer Mott insulator in a trilayer moiré superlattice," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Lijun Zhu & Xiaoqiang Liu & Lin Li & Xinyi Wan & Ran Tao & Zhongniu Xie & Ji Feng & Changgan Zeng, 2023. "Signature of quantum interference effect in inter-layer Coulomb drag in graphene-based electronic double-layer systems," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. Meng Zhao & Zhongjie Wang & Lu Liu & Chunzheng Wang & Cheng-Yen Liu & Fang Yang & Hua Wu & Chunlei Gao, 2024. "Atomic-scale visualization of the interlayer Rydberg exciton complex in moiré heterostructures," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    4. Qiang Gao & Yang-hao Chan & Yuzhe Wang & Haotian Zhang & Pu Jinxu & Shengtao Cui & Yichen Yang & Zhengtai Liu & Dawei Shen & Zhe Sun & Juan Jiang & Tai C. Chiang & Peng Chen, 2023. "Evidence of high-temperature exciton condensation in a two-dimensional semimetal," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36857-7. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.