IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v14y2023i1d10.1038_s41467-023-35987-2.html
   My bibliography  Save this article

Chiral excitonic order from twofold van Hove singularities in kagome metals

Author

Listed:
  • Harley D. Scammell

    (University of New South Wales
    University of New South Wales)

  • Julian Ingham

    (Boston University)

  • Tommy Li

    (Freie Universität Berlin)

  • Oleg P. Sushkov

    (University of New South Wales
    University of New South Wales)

Abstract

Recent experiments on kagome metals AV3Sb5 (A=K,Rb,Cs) identify twofold van Hove singularities (TvHS) with opposite concavity near the Fermi energy, generating two approximately hexagonal Fermi surfaces – one electron-like and the other hole-like. Here we propose that a TvHS generates a novel time-reversal symmetry breaking excitonic order – arising due to bound pairs of electrons and holes located at opposite concavity van Hove singularities. We introduce a minimal model for the TvHS and investigate interaction induced many-body instabilities via the perturbative renormalisation group technique and a free energy analysis. Specialising to parameters appropriate for the kagome metals AV3Sb5, we construct a phase diagram comprising chiral excitons, charge density wave and a region of coexistence. We propose this as an explanation of a diverse range of experimental observations in AV3Sb5. Notably, the chiral excitonic state gives rise to a quantum anomalous Hall conductance, providing an appealing interpretation of the observed anomalous Hall effect in kagome metals. Possible alternative realisations of the TvHS mechanism in bilayer materials are also discussed. We suggest that TvHS open up interesting possibilities for correlated phases, enriching the set of competing ground states to include excitonic order.

Suggested Citation

  • Harley D. Scammell & Julian Ingham & Tommy Li & Oleg P. Sushkov, 2023. "Chiral excitonic order from twofold van Hove singularities in kagome metals," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-35987-2
    DOI: 10.1038/s41467-023-35987-2
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-023-35987-2
    File Function: Abstract
    Download Restriction: no

    File URL: https://libkey.io/10.1038/s41467-023-35987-2?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. He Zhao & Hong Li & Brenden R. Ortiz & Samuel M. L. Teicher & Takamori Park & Mengxing Ye & Ziqiang Wang & Leon Balents & Stephen D. Wilson & Ilija Zeljkovic, 2021. "Cascade of correlated electron states in the kagome superconductor CsV3Sb5," Nature, Nature, vol. 599(7884), pages 216-221, November.
    2. Hongyi Yu & Gui-Bin Liu & Pu Gong & Xiaodong Xu & Wang Yao, 2014. "Dirac cones and Dirac saddle points of bright excitons in monolayer transition metal dichalcogenides," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    3. Yong Hu & Xianxin Wu & Brenden R. Ortiz & Sailong Ju & Xinloong Han & Junzhang Ma & Nicholas C. Plumb & Milan Radovic & Ronny Thomale & Stephen D. Wilson & Andreas P. Schnyder & Ming Shi, 2022. "Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5," Nature Communications, Nature, vol. 13(1), pages 1-7, 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. Rina Tazai & Youichi Yamakawa & Hiroshi Kontani, 2023. "Charge-loop current order and Z3 nematicity mediated by bond order fluctuations in kagome metals," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Changwon Park & Young-Woo Son, 2023. "Condensation of preformed charge density waves in kagome metals," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Wenbin Wu & Zeping Shi & Mykhaylo Ozerov & Yuhan Du & Yuxiang Wang & Xiao-Sheng Ni & Xianghao Meng & Xiangyu Jiang & Guangyi Wang & Congming Hao & Xinyi Wang & Pengcheng Zhang & Chunhui Pan & Haifeng , 2024. "The discovery of three-dimensional Van Hove singularity," Nature Communications, Nature, vol. 15(1), pages 1-11, 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. Yong Hu & Junzhang Ma & Yinxiang Li & Yuxiao Jiang & Dariusz Jakub Gawryluk & Tianchen Hu & Jérémie Teyssier & Volodymyr Multian & Zhouyi Yin & Shuxiang Xu & Soohyeon Shin & Igor Plokhikh & Xinloong H, 2024. "Phonon promoted charge density wave in topological kagome metal ScV6Sn6," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Boqin Song & Tianping Ying & Xianxin Wu & Wei Xia & Qiangwei Yin & Qinghua Zhang & Yanpeng Song & Xiaofan Yang & Jiangang Guo & Lin Gu & Xiaolong Chen & Jiangping Hu & Andreas P. Schnyder & Hechang Le, 2023. "Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Yaofeng Xie & Nathan Chalus & Zhiwei Wang & Weiliang Yao & Jinjin Liu & Yugui Yao & Jonathan S. White & Lisa M. DeBeer-Schmitt & Jia-Xin Yin & Pengcheng Dai & Morten Ring Eskildsen, 2024. "Conventional superconductivity in the doped kagome superconductor Cs(V0.86Ta0.14)3Sb5 from vortex lattice studies," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    4. Yang Luo & Yulei Han & Jinjin Liu & Hui Chen & Zihao Huang & Linwei Huai & Hongyu Li & Bingqian Wang & Jianchang Shen & Shuhan Ding & Zeyu Li & Shuting Peng & Zhiyuan Wei & Yu Miao & Xiupeng Sun & Zhi, 2023. "A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    5. Xinjian Wei & Congkuan Tian & Hang Cui & Yuxin Zhai & Yongkai Li & Shaobo Liu & Yuanjun Song & Ya Feng & Miaoling Huang & Zhiwei Wang & Yi Liu & Qihua Xiong & Yugui Yao & X. C. Xie & Jian-Hao Chen, 2024. "Three-dimensional hidden phase probed by in-plane magnetotransport in kagome metal CsV3Sb5 thin flakes," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    6. Subhasis Samanta & Hwiwoo Park & Chanhyeon Lee & Sungmin Jeon & Hengbo Cui & Yong-Xin Yao & Jungseek Hwang & Kwang-Yong Choi & Heung-Sik Kim, 2024. "Emergence of flat bands and ferromagnetic fluctuations via orbital-selective electron correlations in Mn-based kagome metal," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    7. Saizheng Cao & Chenchao Xu & Hiroshi Fukui & Taishun Manjo & Ying Dong & Ming Shi & Yang Liu & Chao Cao & Yu Song, 2023. "Competing charge-density wave instabilities in the kagome metal ScV6Sn6," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    8. Huimin Zhang & Basu Dev Oli & Qiang Zou & Xu Guo & Zhengfei Wang & Lian Li, 2023. "Visualizing symmetry-breaking electronic orders in epitaxial Kagome magnet FeSn films," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    9. Sen Zhou & Ziqiang Wang, 2022. "Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagomé superconductors," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    10. D. Subires & A. Korshunov & A. H. Said & L. Sánchez & Brenden R. Ortiz & Stephen D. Wilson & A. Bosak & S. Blanco-Canosa, 2023. "Order-disorder charge density wave instability in the kagome metal (Cs,Rb)V3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    11. M. Roppongi & K. Ishihara & Y. Tanaka & K. Ogawa & K. Okada & S. Liu & K. Mukasa & Y. Mizukami & Y. Uwatoko & R. Grasset & M. Konczykowski & B. R. Ortiz & S. D. Wilson & K. Hashimoto & T. Shibauchi, 2023. "Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    12. A. Korshunov & H. Hu & D. Subires & Y. Jiang & D. Călugăru & X. Feng & A. Rajapitamahuni & C. Yi & S. Roychowdhury & M. G. Vergniory & J. Strempfer & C. Shekhar & E. Vescovo & D. Chernyshov & A. H. Sa, 2023. "Softening of a flat phonon mode in the kagome ScV6Sn6," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    13. Ziyuan Chen & Xueliang Wu & Shiming Zhou & Jiakang Zhang & Ruotong Yin & Yuanji Li & Mingzhe Li & Jiashuo Gong & Mingquan He & Yisheng Chai & Xiaoyuan Zhou & Yilin Wang & Aifeng Wang & Ya-Jun Yan & Do, 2024. "Discovery of a long-ranged charge order with 1/4 Ge1-dimerization in an antiferromagnetic Kagome metal," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    14. Jiangang Yang & Xinwei Yi & Zhen Zhao & Yuyang Xie & Taimin Miao & Hailan Luo & Hao Chen & Bo Liang & Wenpei Zhu & Yuhan Ye & Jing-Yang You & Bo Gu & Shenjin Zhang & Fengfeng Zhang & Feng Yang & Zhimi, 2023. "Observation of flat band, Dirac nodal lines and topological surface states in Kagome superconductor CsTi3Bi5," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    15. Kai-Qiang Lin & Jonas D. Ziegler & Marina A. Semina & Javid V. Mamedov & Kenji Watanabe & Takashi Taniguchi & Sebastian Bange & Alexey Chernikov & Mikhail M. Glazov & John M. Lupton, 2022. "High-lying valley-polarized trions in 2D semiconductors," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    16. Honglie Ning & Kyoung Hun Oh & Yifan Su & Alexander Hoegen & Zach Porter & Andrea Capa Salinas & Quynh L. Nguyen & Matthieu Chollet & Takahiro Sato & Vincent Esposito & Matthias C. Hoffmann & Adam Whi, 2024. "Dynamical decoding of the competition between charge density waves in a kagome superconductor," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    17. Yigui Zhong & Shaozhi Li & Hongxiong Liu & Yuyang Dong & Kohei Aido & Yosuke Arai & Haoxiang Li & Weilu Zhang & Youguo Shi & Ziqiang Wang & Shik Shin & H. N. Lee & H. Miao & Takeshi Kondo & Kozo Okaza, 2023. "Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    18. Wenbin Wu & Zeping Shi & Mykhaylo Ozerov & Yuhan Du & Yuxiang Wang & Xiao-Sheng Ni & Xianghao Meng & Xiangyu Jiang & Guangyi Wang & Congming Hao & Xinyi Wang & Pengcheng Zhang & Chunhui Pan & Haifeng , 2024. "The discovery of three-dimensional Van Hove singularity," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    19. Raul Perea-Causin & Samuel Brem & Fabian Buchner & Yao Lu & Kenji Watanabe & Takashi Taniguchi & John M. Lupton & Kai-Qiang Lin & Ermin Malic, 2024. "Electrically tunable layer-hybridized trions in doped WSe2 bilayers," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    20. Camron Farhang & Jingyuan Wang & Brenden R. Ortiz & Stephen D. Wilson & Jing Xia, 2023. "Unconventional specular optical rotation in the charge ordered state of Kagome metal CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-8, 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_s41467-023-35987-2. 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.