Imaging Electrostatically Confined Dirac Fermions in Elliptically Shaped Graphene Quantum Dot

Oral-In-person

Abstract

Monolayer graphene (MLG) provides a unique platform for investigating relativistic quantum phenomena due to its linear band dispersion for low energy excitations. In this talk, I will present our recent experimental results on electrostatically confined elliptical quantum dots (QDs) in MLG using scanning tunneling microscopy and spectroscopy at low temperature. Unlike in a circular QD, charge carriers display anisotropic behaviors along major and minor axes in an elliptical QD, which is revealed by dI/dV line scans and maps. Dirac and Schrödinger physics in such a system is analyzed theoretically and compared. These findings provide more insight into the nature of confined Dirac Fermions, which can be leveraged for novel nanoelectronic devices.

–

Presenters

  • Tianhui Zhu

    • University of California, Santa Cruz

Authors

  • Tianhui Zhu

    • University of California, Santa Cruz

  • Qirong Yao

    • University of California, Santa Cruz

  • Anton Marius Graf

    • Harvard University

  • Xincong Liu

    • University of California, Santa Cruz

  • Annette Asryan

    • University of California, Santa Cruz

  • Yanzi Lin

    • University of California, Santa Cruz

  • Jucheng Lin

    • shanghai jiao tong university

  • Yicheng Zhuang

    • Peking Univ

  • Takashi Taniguchi

    • National Institute for Materials Science

  • Kenji Watanabe

    • National Institute for Materials Science

  • Joonas Keski-Rahkonen

    • Harvard University

  • Eric Heller

    • Harvard University

  • Jairo Velasco Jr.

    • University of California, Santa Cruz