@article{4444ea0db17a4705a611d4472d7fa1b7,
title = "Nanoscale thermal imaging of VO2via Poole-Frenkel conduction",
abstract = "We present a method for nanoscale thermal imaging of insulating thin films using atomic force microscopy (AFM), and we demonstrate its utility on VO2. We sweep the applied voltage V to a conducting AFM tip in contact mode and measure the local current I through the film. By fitting the IV curves to a Poole-Frenkel conduction model at low V, we calculate the local temperature with spatial resolution better than 50 nm using only fundamental constants and known film properties. Our thermometry technique enables local temperature measurement of any insulating film dominated by the Poole-Frenkel conduction mechanism and can be extended to insulators that display other conduction mechanisms.",
author = "Alyson Spitzig and Adam Pivonka and Alex Frenzel and Jeehoon Kim and Changhyun Ko and You Zhou and Eric Hudson and Shriram Ramanathan and Hoffman, {Jennifer E.} and Hoffman, {Jason D.}",
note = "Funding Information: The experimental work was supported by the National Science Foundation under Grant No. DMR-1231319 (Science and Technology Center Center for Integrated Quantum Materials). The sample fabrication was supported by AFOSR Grant No. FA9550-08-1-0203. J.D.H. acknowledges support from the Gordon and Betty Moore Foundation{\textquoteright}s EPiQS Initiative through Grant No. GBMF4536. A.S. acknowledges support from the Canadian Natural Sciences and Engineering Research Council CGS-M graduate fellowship. The authors thank Harry Mickalide and Kevin O{\textquoteright}Connor for useful discussions. Publisher Copyright: {\textcopyright} 2022 Author(s).",
year = "2022",
month = apr,
day = "11",
doi = "10.1063/5.0086932",
language = "English (US)",
volume = "120",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "15",
}