Nature Communications (Feb 2020)

Ultra-long carrier lifetime in neutral graphene-hBN van der Waals heterostructures under mid-infrared illumination

  • P. Huang,
  • E. Riccardi,
  • S. Messelot,
  • H. Graef,
  • F. Valmorra,
  • J. Tignon,
  • T. Taniguchi,
  • K. Watanabe,
  • S. Dhillon,
  • B. Plaçais,
  • R. Ferreira,
  • J. Mangeney

DOI
https://doi.org/10.1038/s41467-020-14714-1
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 9

Abstract

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Long carrier lifetimes are beneficial for graphene-based optoelectronics, but carrier recombination processes in graphene possess sub-picosecond characteristic times. Here, the authors report carrier lifetimes ~30 ps at low energy in graphene/hBN Zener-Klein transistors, attributed to interband Auger processes.