Observation of flat bands in niobium halide semiconductor

POSTER

Abstract

Kagome materials are potential systems for Dirac fermions and flat bands, which make them suitable grounds for the study of topology and electronic correlations in geometrically frustrated quantum materials. This study investigates the electronic structure of one such material, a niobium halide semiconductor, with a breathing kagome lattice of niobium atoms. We reveal the presence of multiple flat and weak dispersing bands, that are well captured in theoretical band calculations as well. Being a layered van der Waals material with a magnetic monolayer, this system will open up avenues toward the study of electronic correlations, magnetic order, and their interplay in two dimensions as well as toward its potential applications.

*This work is supported by the National Science Foundation (NSF) CAREER award DMR-1847962, the Air Force Office of Scientific Research MURI Grant No. FA9550-20-1-0322, and NSF Partnerships for Research and Education in Materials (PREM) Grant DMR-2121953.

Presenters

  • Alexis J Agosto-Cuevas

    • University of Central Florida

Authors

  • Alexis J Agosto-Cuevas

    • University of Central Florida

  • Sabin Regmi

    • University of Central Florida
    • University of Central Florida; Idaho National Laboratory

  • Tharindu Warnakulasooriya Fernando

    • University of Washington
    • tharindu@uw.edu

  • Yuzhou Zhao

    • University of Washington

  • Anup Pradhan Sakhya

    • University of Central Florida
    • Department of Physics, University of Central Florida, Orlando, Florida 32816, USA

  • Gyanendra Dhakal

    • University of Central Florida

  • Iftakhar Bin Elius

    • University of Central Florida
    • University of Central FLorida

  • Hector Vazquez

    • University of Central Florida

  • Jonathan D Denlinger

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory, Berkeley, California

  • Jihui Yang

    • University of Washington

  • Jiun-Haw Chu

    • University of Washington
    • University of Washington, Seattle, Washington, USA

  • Xiaodong Xu

    • University of Washington

  • Ting Cao

    • University of Washington
    • Department of Materials Science & Engineering, University of Washington

  • Madhab Neupane

    • University of Central Florida