Kagome bands disguised in a coloring-triangle lattice

POSTER

Abstract

The kagome bands hosting exotic quantum phases generally and understandably pertain only to a kagome lattice. This has severely hampered the research of kagome physics due to the lack of real kagome-lattice materials. Interestingly, we discover that a coloring-triangle (CT) lattice, named after color-triangle tiling, also hosts kagome bands. We demonstrate first theoretically the equivalency between the kagome and CT lattices, and then computationally in photonic (waveguide lattice) and electronic (Au overlayer on electride Ca2N surface) systems by first-principles calculations. The theory can be generalized to even distorted kagome and CT lattices to exhibit ideal kagome bands. Our findings open an avenue to explore the alluding kagome physics.

*NSFC (11774196, 11674256) and Tsinghua University Initiative Scientific Research Program.
National Postdoctoral Program for Innovative Talents of China (BX201600091) and the Funding from China Postdoctoral Science Foundation (2017M610858)
US-DOE (DEFG02-04ER46148).
National Key Basic Research Program (Grant No. 2015CB932400)

Presenters

  • Shunhong Zhang

    • ICQD, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
    • ICQD, University of Science and Technology of China
    • International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of
    • University of Science and Technology of China
    • University of Science and Technology of China, Hefei 230026, China

Authors

  • Shunhong Zhang

    • ICQD, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
    • ICQD, University of Science and Technology of China
    • International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of
    • University of Science and Technology of China
    • University of Science and Technology of China, Hefei 230026, China

  • Meng Kang

    • Wuhan University

  • Huaqing Huang

    • Utah University
    • University of Utah

  • Wei Jiang

    • University of Minnesota

  • Xiaojuan Ni

    • University of Utah

  • Lei Kang

    • Beijing Computational Science Research Center

  • Shunping Zhang

    • Wuhan University

  • Hongxing Xu

    • Wuhan University

  • Zheng Liu

    • Institute for Advanced Study, Tsinghua University
    • Tsinghua University

  • Feng Liu

    • Utah University
    • University of Utah
    • Department of Materials Science and Engineering, University of Utah
    • Materials Science and Engineering, University of Utah