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Charge-induced phase transition in encapsulated HfTe2 nanoribbons

Derek Popple1,2,3, Mehmet Dogan2, Tony Vo Hoang1, Scott Stonemeyer1,2,3, Peter Ercius4, Karen C. Bustillo4, Marvin Cohen2, and Alex Zettl2,3,*

  • 1Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA
  • 2Department of Physics, University of California Berkeley, Berkeley, California 94720, USA and Materials Sciences Division, Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley California 94720, USA
  • 3Kavli Energy NanoScience Institute at the University of California at Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 4National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley California 94720, USA

  • *azettl@berkeley.edu
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Phys. Rev. Materials 7, L013001 – Published 4 January, 2023

DOI: https://doi.org/10.1103/PhysRevMaterials.7.L013001

Abstract

Nanotube encapsulation is a powerful technique for coaxing solids into unconventional configurations. By synthesizing materials within the interior confines of hollow nanotubes, lower dimensional morphologies, such as one-dimensional chains or nanoribbons, are favored. We have used carbon nanotube encapsulation to realize ultranarrow, atomically precise HfTe2 nanoribbons. A local, electron-beam-stimulated transition from the metallic 1T phase to the previously unreported semiconducting 1H phase is observed. We study computationally how charging can drive the phase transition and the stability of the different atomic configurations.

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Phys. Rev. Materials 7, L013001– Published 4 January, 2023
  • Received 4 October 2022
  • Accepted 18 November 2022
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