IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v14y2023i1d10.1038_s41467-023-39855-x.html
   My bibliography  Save this article

Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe2

Author

Listed:
  • Saisab Bhowmik

    (Indian Institute of Science)

  • Bhaskar Ghawri

    (Indian Institute of Science)

  • Youngju Park

    (University of Seoul)

  • Dongkyu Lee

    (University of Seoul
    University of Seoul)

  • Suvronil Datta

    (Indian Institute of Science)

  • Radhika Soni

    (Indian Institute of Science)

  • K. Watanabe

    (National Institute for Materials Science)

  • T. Taniguchi

    (National Institute for Materials Science)

  • Arindam Ghosh

    (Indian Institute of Science
    Indian Institute of Science)

  • Jeil Jung

    (University of Seoul
    University of Seoul)

  • U. Chandni

    (Indian Institute of Science)

Abstract

Recent experiments in magic-angle twisted bilayer graphene have revealed a wealth of novel electronic phases as a result of interaction-driven spin-valley flavour polarisation. In this work, we investigate correlated phases due to the combined effect of spin-orbit coupling-enhanced valley polarisation and the large density of states below half filling of the moiré band in twisted bilayer graphene coupled to tungsten diselenide. We observe an anomalous Hall effect, accompanied by a series of Lifshitz transitions that are highly tunable with carrier density and magnetic field. The magnetisation shows an abrupt change of sign near half-filling, confirming its orbital nature. While the Hall resistance is not quantised at zero magnetic fields—indicating a ground state with partial valley polarisation—perfect quantisation and complete valley polarisation are observed at finite fields. Our results illustrate that singularities in the flat bands in the presence of spin-orbit coupling can stabilise ordered phases even at non-integer moiré band fillings.

Suggested Citation

  • Saisab Bhowmik & Bhaskar Ghawri & Youngju Park & Dongkyu Lee & Suvronil Datta & Radhika Soni & K. Watanabe & T. Taniguchi & Arindam Ghosh & Jeil Jung & U. Chandni, 2023. "Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe2," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39855-x
    DOI: 10.1038/s41467-023-39855-x
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-023-39855-x
    File Function: Abstract
    Download Restriction: no

    File URL: https://libkey.io/10.1038/s41467-023-39855-x?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. Bhaskar Ghawri & Phanibhusan S. Mahapatra & Manjari Garg & Shinjan Mandal & Saisab Bhowmik & Aditya Jayaraman & Radhika Soni & Kenji Watanabe & Takashi Taniguchi & H. R. Krishnamurthy & Manish Jain & , 2022. "Breakdown of semiclassical description of thermoelectricity in near-magic angle twisted bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Yuan Cao & Valla Fatemi & Shiang Fang & Kenji Watanabe & Takashi Taniguchi & Efthimios Kaxiras & Pablo Jarillo-Herrero, 2018. "Unconventional superconductivity in magic-angle graphene superlattices," Nature, Nature, vol. 556(7699), pages 43-50, April.
    3. Youngjoon Choi & Hyunjin Kim & Yang Peng & Alex Thomson & Cyprian Lewandowski & Robert Polski & Yiran Zhang & Harpreet Singh Arora & Kenji Watanabe & Takashi Taniguchi & Jason Alicea & Stevan Nadj-Per, 2021. "Correlation-driven topological phases in magic-angle twisted bilayer graphene," Nature, Nature, vol. 589(7843), pages 536-541, January.
    4. H. Polshyn & J. Zhu & M. A. Kumar & Y. Zhang & F. Yang & C. L. Tschirhart & M. Serlin & K. Watanabe & T. Taniguchi & A. H. MacDonald & A. F. Young, 2020. "Electrical switching of magnetic order in an orbital Chern insulator," Nature, Nature, vol. 588(7836), pages 66-70, December.
    5. Minhao He & Ya-Hui Zhang & Yuhao Li & Zaiyao Fei & Kenji Watanabe & Takashi Taniguchi & Xiaodong Xu & Matthew Yankowitz, 2021. "Competing correlated states and abundant orbital magnetism in twisted monolayer-bilayer graphene," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    6. Kevin P. Nuckolls & Myungchul Oh & Dillon Wong & Biao Lian & Kenji Watanabe & Takashi Taniguchi & B. Andrei Bernevig & Ali Yazdani, 2020. "Strongly correlated Chern insulators in magic-angle twisted bilayer graphene," Nature, Nature, vol. 588(7839), pages 610-615, December.
    7. Harpreet Singh Arora & Robert Polski & Yiran Zhang & Alex Thomson & Youngjoon Choi & Hyunjin Kim & Zhong Lin & Ilham Zaky Wilson & Xiaodong Xu & Jiun-Haw Chu & Kenji Watanabe & Takashi Taniguchi & Jas, 2020. "Superconductivity in metallic twisted bilayer graphene stabilized by WSe2," Nature, Nature, vol. 583(7816), pages 379-384, July.
    8. Xiaobo Lu & Petr Stepanov & Wei Yang & Ming Xie & Mohammed Ali Aamir & Ipsita Das & Carles Urgell & Kenji Watanabe & Takashi Taniguchi & Guangyu Zhang & Adrian Bachtold & Allan H. MacDonald & Dmitri K, 2019. "Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene," Nature, Nature, vol. 574(7780), pages 653-657, October.
    9. Petr Stepanov & Ipsita Das & Xiaobo Lu & Ali Fahimniya & Kenji Watanabe & Takashi Taniguchi & Frank H. L. Koppens & Johannes Lischner & Leonid Levitov & Dmitri K. Efetov, 2020. "Untying the insulating and superconducting orders in magic-angle graphene," Nature, Nature, vol. 583(7816), pages 375-378, July.
    10. Manabendra Kuiri & Christopher Coleman & Zhenxiang Gao & Aswin Vishnuradhan & Kenji Watanabe & Takashi Taniguchi & Jihang Zhu & Allan H. MacDonald & Joshua Folk, 2022. "Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    Full references (including those not matched with items on IDEAS)

    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. J. Díez-Mérida & A. Díez-Carlón & S. Y. Yang & Y.-M. Xie & X.-J. Gao & J. Senior & K. Watanabe & T. Taniguchi & X. Lu & A. P. Higginbotham & K. T. Law & Dmitri K. Efetov, 2023. "Symmetry-broken Josephson junctions and superconducting diodes in magic-angle twisted bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Canxun Zhang & Tiancong Zhu & Tomohiro Soejima & Salman Kahn & Kenji Watanabe & Takashi Taniguchi & Alex Zettl & Feng Wang & Michael P. Zaletel & Michael F. Crommie, 2023. "Local spectroscopy of a gate-switchable moiré quantum anomalous Hall insulator," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. Si-yu Li & Zhengwen Wang & Yucheng Xue & Yingbo Wang & Shihao Zhang & Jianpeng Liu & Zheng Zhu & Kenji Watanabe & Takashi Taniguchi & Hong-jun Gao & Yuhang Jiang & Jinhai Mao, 2022. "Imaging topological and correlated insulating states in twisted monolayer-bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    4. Jesse C. Hoke & Yifan Li & Julian May-Mann & Kenji Watanabe & Takashi Taniguchi & Barry Bradlyn & Taylor L. Hughes & Benjamin E. Feldman, 2024. "Uncovering the spin ordering in magic-angle graphene via edge state equilibration," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    5. Pratap Chandra Adak & Subhajit Sinha & Debasmita Giri & Dibya Kanti Mukherjee & Chandan & L. D. Varma Sangani & Surat Layek & Ayshi Mukherjee & Kenji Watanabe & Takashi Taniguchi & H. A. Fertig & Arij, 2022. "Perpendicular electric field drives Chern transitions and layer polarization changes in Hofstadter bands," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    6. Le Liu & Shihao Zhang & Yanbang Chu & Cheng Shen & Yuan Huang & Yalong Yuan & Jinpeng Tian & Jian Tang & Yiru Ji & Rong Yang & Kenji Watanabe & Takashi Taniguchi & Dongxia Shi & Jianpeng Liu & Wei Yan, 2022. "Isospin competitions and valley polarized correlated insulators in twisted double bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    7. Anushree Datta & M. J. Calderón & A. Camjayi & E. Bascones, 2023. "Heavy quasiparticles and cascades without symmetry breaking in twisted bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    8. Wenqiang Zhou & Jing Ding & Jiannan Hua & Le Zhang & Kenji Watanabe & Takashi Taniguchi & Wei Zhu & Shuigang Xu, 2024. "Layer-polarized ferromagnetism in rhombohedral multilayer graphene," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    9. Xiangyan Han & Yuting Zou & Qianling Liu & Zhiyu Wang & Ruirui Niu & Zhuangzhuang Qu & Zhuoxian Li & Chunrui Han & Kenji Watanabe & Takashi Taniguchi & Baojuan Dong & Zhida Song & Jinhai Mao & Zheng H, 2024. "Suppression of symmetry-breaking correlated insulators in a rhombohedral trilayer graphene superlattice," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    10. Jiachen Yu & Benjamin A. Foutty & Yves H. Kwan & Mark E. Barber & Kenji Watanabe & Takashi Taniguchi & Zhi-Xun Shen & Siddharth A. Parameswaran & Benjamin E. Feldman, 2023. "Spin skyrmion gaps as signatures of strong-coupling insulators in magic-angle twisted bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    11. Keshav Singh & Aaron Chew & Jonah Herzog-Arbeitman & B. Andrei Bernevig & Oskar Vafek, 2024. "Topological heavy fermions in magnetic field," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    12. Hongyun Zhang & Qian Li & Youngju Park & Yujin Jia & Wanying Chen & Jiaheng Li & Qinxin Liu & Changhua Bao & Nicolas Leconte & Shaohua Zhou & Yuan Wang & Kenji Watanabe & Takashi Taniguchi & Jose Avil, 2024. "Observation of dichotomic field-tunable electronic structure in twisted monolayer-bilayer graphene," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    13. Shuichi Iwakiri & Alexandra Mestre-Torà & Elías Portolés & Marieke Visscher & Marta Perego & Giulia Zheng & Takashi Taniguchi & Kenji Watanabe & Manfred Sigrist & Thomas Ihn & Klaus Ensslin, 2024. "Tunable quantum interferometer for correlated moiré electrons," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    14. Martin Claassen & Lede Xian & Dante M. Kennes & Angel Rubio, 2022. "Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS2 bilayers," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    15. Shubhayu Chatterjee & Taige Wang & Erez Berg & Michael P. Zaletel, 2022. "Inter-valley coherent order and isospin fluctuation mediated superconductivity in rhombohedral trilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    16. Eslam Khalaf & Ashvin Vishwanath, 2022. "Baby skyrmions in Chern ferromagnets and topological mechanism for spin-polaron formation in twisted bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    17. Daniel Shaffer & Jian Wang & Luiz H. Santos, 2022. "Unconventional self-similar Hofstadter superconductivity from repulsive interactions," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    18. Sami Dzsaber & Diego A. Zocco & Alix McCollam & Franziska Weickert & Ross McDonald & Mathieu Taupin & Gaku Eguchi & Xinlin Yan & Andrey Prokofiev & Lucas M. K. Tang & Bryan Vlaar & Laurel E. Winter & , 2022. "Control of electronic topology in a strongly correlated electron system," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    19. Trithep Devakul & Valentin Crépel & Yang Zhang & Liang Fu, 2021. "Magic in twisted transition metal dichalcogenide bilayers," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    20. Maine Christos & Subir Sachdev & Mathias S. Scheurer, 2023. "Nodal band-off-diagonal superconductivity in twisted graphene superlattices," Nature Communications, Nature, vol. 14(1), pages 1-11, 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_s41467-023-39855-x. 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.