Corpus ID: 119434132

Nanoscale Thermal Imaging of VO$_2$ via Poole-Frenkel Conduction

  title={Nanoscale Thermal Imaging of VO\$_2\$ via Poole-Frenkel Conduction},
  author={A. Spitzig and Adam Pivonka and Harry Mickalide and A. Frenzel and Jeehoon Kim and Chang-hyun Ko and Y. Zhou and K. O’Connor and E. Hudson and S. Ramanathan and J. Hoffman},
  journal={Bulletin of the American Physical Society},
  • A. Spitzig, Adam Pivonka, +9 authors J. Hoffman
  • Published 2017
  • Materials Science, Physics
  • Bulletin of the American Physical Society
  • We present a new method for nanoscale thermal imaging of insulating thin films using atomic force microscopy (AFM). By sweeping the voltage applied to a conducting AFM tip in contact mode, we measure the local current through a VO$_2$ film. We fit the resultant current-voltage curves to a Poole-Frenkel conduction model to extract the local temperature of the film using fundamental constants and known film properties. As the local voltage is further increased, the nanoscale region of VO$_2… CONTINUE READING

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