ACS Publications. Most Trusted. Most Cited. Most Read
My Activity
CONTENT TYPES

Imaging Andreev Reflection in Graphene

  • Sagar Bhandari
    Sagar Bhandari
    School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
    Department of Physics and Engineering, Slippery Rock University, Slippery Rock, Pennsylvania 16057, United States
  • Gil-Ho Lee
    Gil-Ho Lee
    Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States
    Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
    More by Gil-Ho Lee
  • Kenji Watanabe
    Kenji Watanabe
    National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • Takashi Taniguchi
    Takashi Taniguchi
    National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • Philip Kim
    Philip Kim
    School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
    Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States
    More by Philip Kim
  • , and 
  • Robert M. Westervelt*
    Robert M. Westervelt
    School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
    Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States
    *Email: [email protected]
Cite this: Nano Lett. 2020, 20, 7, 4890–4894
Publication Date (Web):June 2, 2020
https://doi.org/10.1021/acs.nanolett.0c00903
Copyright © 2020 American Chemical Society

    Article Views

    1931

    Altmetric

    -

    Citations

    LEARN ABOUT THESE METRICS
    Other access options

    Abstract

    Abstract Image

    Coherent charge transport along ballistic paths can be introduced into graphene by Andreev reflection, for which an electron reflects from a superconducting contact as a hole, while a Cooper pair is transmitted. We use liquid-helium cooled scanning gate microscopy (SGM) to image Andreev reflection in graphene in the magnetic focusing regime, where carriers move along cyclotron orbits between contacts. Images of flow are obtained by deflecting carrier paths and displaying the resulting change in conductance. When electrons enter the superconductor, Andreev-reflected holes leave for the collecting contact. To test the results, we destroy Andreev reflection with a large current and by heating above the critical temperature. In both cases, the reflected carriers change from holes to electrons.

    Read this article

    To access this article, please review the available access options below.

    Get instant access

    Purchase Access

    Read this article for 48 hours. Check out below using your ACS ID or as a guest.

    Recommended

    Access through Your Institution

    You may have access to this article through your institution.

    Your institution does not have access to this content. You can change your affiliated institution below.

    Cited By

    This article is cited by 14 publications.

    1. Samuel W. LaGasse, Cory D. Cress. Unveiling Electron Optics in Two-Dimensional Materials by Nonlocal Resistance Mapping. Nano Letters 2020, 20 (9) , 6623-6629. https://doi.org/10.1021/acs.nanolett.0c02443
    2. S. Maji, K. Sowa, M. P. Nowak. Scanning gate microscopy of nonretracing electron-hole trajectories in a normal-superconductor junction. Physical Review B 2024, 109 (11) https://doi.org/10.1103/PhysRevB.109.115410
    3. Xing Wang, Yu-Xian Li. Andreev reflection imaging and longitudinal shift of pseudospin-1 fermions in two-dimensional materials. Applied Physics Letters 2023, 123 (24) https://doi.org/10.1063/5.0170571
    4. Panch Ram, Detlef Beckmann, Romain Danneau, Wolfgang Belzig. Andreev and normal reflections in gapped bilayer graphene–superconductor junctions. Physical Review B 2023, 108 (18) https://doi.org/10.1103/PhysRevB.108.184510
    5. Xiaohui Wang, Hao Geng, Wei Luo, Wei Chen. Competitive spin-flipped normal reflection and equal-spin Andreev reflection in heterojunctions of nodal-line superconductors. Physical Review B 2023, 107 (19) https://doi.org/10.1103/PhysRevB.107.195109
    6. F. J. A. Linard, V. N. Moura, L. Covaci, M. V. Milošević, A. Chaves. Wave-packet scattering at a normal-superconductor interface in two-dimensional materials: A generalized theoretical approach. Physical Review B 2023, 107 (16) https://doi.org/10.1103/PhysRevB.107.165306
    7. A. A. Zhukov. Inhomogeneity of the Current Flow in High-Quality InN Nanowires. JETP Letters 2022, 115 (8) , 449-455. https://doi.org/10.1134/S0021364022100332
    8. Hassan Ghadiri, Alireza Saffarzadeh. Electron beam splitting at topological insulator surface states and a proposal for electronic Goos-Hänchen shift measurement. Physical Review B 2022, 105 (8) https://doi.org/10.1103/PhysRevB.105.085415
    9. Antonio Manesco, Ian Matthias Flór, Chun-Xiao Liu, Anton Akhmerov. Mechanisms of Andreev reflection in quantum Hall graphene. SciPost Physics Core 2022, 5 (3) https://doi.org/10.21468/SciPostPhysCore.5.3.045
    10. Lucila Peralta Gavensky, Gonzalo Usaj, C. A. Balseiro. Imaging chiral Andreev reflection in the presence of Rashba spin-orbit coupling. Physical Review B 2021, 104 (11) https://doi.org/10.1103/PhysRevB.104.115435
    11. Luke R. St. Marie, Chieh-I Liu, I-Fan Hu, Heather M. Hill, Dipanjan Saha, Randolph E. Elmquist, Chi-Te Liang, David B. Newell, Paola Barbara, Joseph A. Hagmann, Albert F. Rigosi. Abrikosov vortex corrections to effective magnetic field enhancement in epitaxial graphene. Physical Review B 2021, 104 (8) https://doi.org/10.1103/PhysRevB.104.085435
    12. Lucila Peralta Gavensky, Gonzalo Usaj, C. A. Balseiro. Nonequilibrium edge transport in quantum Hall based Josephson junctions. Physical Review B 2021, 103 (2) https://doi.org/10.1103/PhysRevB.103.024527
    13. A. Chaves, V. N. Moura, F. J. A. Linard, L. Covaci, M. V. Milošević. Tunable magnetic focusing using Andreev scattering in superconductor-graphene hybrid devices. Journal of Applied Physics 2020, 128 (12) https://doi.org/10.1063/5.0020392
    14. Lucila Peralta Gavensky, Gonzalo Usaj, C. A. Balseiro. Majorana fermions on the quantum Hall edge. Physical Review Research 2020, 2 (3) https://doi.org/10.1103/PhysRevResearch.2.033218

    Pair your accounts.

    Export articles to Mendeley

    Get article recommendations from ACS based on references in your Mendeley library.

    Pair your accounts.

    Export articles to Mendeley

    Get article recommendations from ACS based on references in your Mendeley library.

    You’ve supercharged your research process with ACS and Mendeley!

    STEP 1:
    Click to create an ACS ID

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    MENDELEY PAIRING EXPIRED
    Your Mendeley pairing has expired. Please reconnect