IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v8y2017i1d10.1038_s41467-017-01065-7.html
   My bibliography  Save this article

Anomalous quantization trajectory and parity anomaly in Co cluster decorated BiSbTeSe2 nanodevices

Author

Listed:
  • Shuai Zhang

    (Nanjing University)

  • Li Pi

    (University of Science and Technology of China
    Chinese Academy of Sciences and Collaborative Innovation Center of Advanced Microstructures)

  • Rui Wang

    (Nanjing University)

  • Geliang Yu

    (Nanjing University)

  • Xing-Chen Pan

    (Nanjing University)

  • Zhongxia Wei

    (Nanjing University)

  • Jinglei Zhang

    (Chinese Academy of Sciences and Collaborative Innovation Center of Advanced Microstructures)

  • Chuanying Xi

    (Chinese Academy of Sciences and Collaborative Innovation Center of Advanced Microstructures)

  • Zhanbin Bai

    (Nanjing University)

  • Fucong Fei

    (Nanjing University)

  • Mingyu Wang

    (Nanjing University)

  • Jian Liao

    (Chinese Academy of Sciences)

  • Yongqing Li

    (Chinese Academy of Sciences)

  • Xuefeng Wang

    (Nanjing University)

  • Fengqi Song

    (Nanjing University)

  • Yuheng Zhang

    (Chinese Academy of Sciences and Collaborative Innovation Center of Advanced Microstructures)

  • Baigeng Wang

    (Nanjing University)

  • Dingyu Xing

    (Nanjing University)

  • Guanghou Wang

    (Nanjing University)

Abstract

Dirac Fermions with different helicities exist on the top and bottom surfaces of topological insulators, offering a rare opportunity to break the degeneracy protected by the no-go theorem. Through the application of Co clusters, quantum Hall plateaus were modulated for the topological insulator BiSbTeSe2, allowing an optimized surface transport. Here, using renormalization group flow diagrams, we show the extraction of two sets of converging points in the conductivity tensor space, revealing that the top surface exhibits an anomalous quantization trajectory, while the bottom surface retains the 1/2 quantization. Co clusters are believed to induce a sizeable Zeeman gap ( > 4.8 meV) through antiferromagnetic exchange coupling, which delays the Landau level hybridization on the top surface for a moderate magnetic field. A quasi-half-integer plateau also appears at −7.2 Tesla. This allows us to study the interesting physics of parity anomaly, and paves the way for further studies simulating exotic particles in condensed matter physics.

Suggested Citation

  • Shuai Zhang & Li Pi & Rui Wang & Geliang Yu & Xing-Chen Pan & Zhongxia Wei & Jinglei Zhang & Chuanying Xi & Zhanbin Bai & Fucong Fei & Mingyu Wang & Jian Liao & Yongqing Li & Xuefeng Wang & Fengqi Son, 2017. "Anomalous quantization trajectory and parity anomaly in Co cluster decorated BiSbTeSe2 nanodevices," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
  • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01065-7
    DOI: 10.1038/s41467-017-01065-7
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-017-01065-7
    File Function: Abstract
    Download Restriction: no

    File URL: https://libkey.io/10.1038/s41467-017-01065-7?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
    ---><---

    Citations

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


    Cited by:

    1. Bo Fu & Kai-Zhi Bai & Shun-Qing Shen, 2024. "Half-quantum mirror Hall effect," Nature Communications, Nature, vol. 15(1), pages 1-14, 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:8:y:2017:i:1:d:10.1038_s41467-017-01065-7. 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.

    We have no bibliographic references for this item. You can help adding them by using 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.