Picosecond soft X-ray absorption measurement of the photo-inducedinsulator-to-metal transition in VO2.

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We directly measure the photoinduced insulator-to-metal transition in VO2 using time-resolved near-edge x-ray absorption. Picosecond pulses of synchrotron radiation are used to detect the redshift in the vanadium L3edge at 516 eV, which is associated with the transient collapse of the low-temperature band gap. We identify a two-component temporal response, corresponding to an ultrafast transformation over a 50 nm surface layer, followed by 40 m/s thermal growth of the metallic phase into the bulk.

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Cavalleri, Andrea; Chong, Henry H.W.; Fourmaux, Sylvain; Glover,Thornton E.; Heimann, Phil A.; Kieffer, Jean Claude et al. February 1, 2004.

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We directly measure the photoinduced insulator-to-metal transition in VO2 using time-resolved near-edge x-ray absorption. Picosecond pulses of synchrotron radiation are used to detect the redshift in the vanadium L3edge at 516 eV, which is associated with the transient collapse of the low-temperature band gap. We identify a two-component temporal response, corresponding to an ultrafast transformation over a 50 nm surface layer, followed by 40 m/s thermal growth of the metallic phase into the bulk.

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  • Journal Name: Physical Review B; Journal Volume: 69; Related Information: Journal Publication Date: 2004

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  • Report No.: LBNL--54765
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1103/PhysRevB.69.153106 | External Link
  • Office of Scientific & Technical Information Report Number: 882071
  • Archival Resource Key: ark:/67531/metadc876055

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  • February 1, 2004

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 30, 2016, 2:04 p.m.

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Cavalleri, Andrea; Chong, Henry H.W.; Fourmaux, Sylvain; Glover,Thornton E.; Heimann, Phil A.; Kieffer, Jean Claude et al. Picosecond soft X-ray absorption measurement of the photo-inducedinsulator-to-metal transition in VO2., article, February 1, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc876055/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.