Universal phase dynamics in VO 2 switches revealed by ultrafast operando diffraction

Author:

Sood Aditya12ORCID,Shen Xiaozhe3ORCID,Shi Yin4ORCID,Kumar Suhas5ORCID,Park Su Ji3ORCID,Zajac Marc2ORCID,Sun Yifei6ORCID,Chen Long-Qing4ORCID,Ramanathan Shriram6,Wang Xijie3ORCID,Chueh William C.12ORCID,Lindenberg Aaron M.123ORCID

Affiliation:

1. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.

2. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.

3. SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.

4. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA.

5. Hewlett Packard Labs, Palo Alto, CA 94304, USA.

6. School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.

Abstract

A transient metal Vanadium dioxide is known to have a coupled structural and electronic transition that can be accessed through light, thermal, or electrical excitation. Ultrafast optical studies of this insulator-to-metal transition indicate that it is mediated by the formation of a transient metallic phase that retains the structure of the original insulating phase. Sood et al. show that a similar sequence occurs when the material is electrically excited with a series of voltage pulses. Using ultrafast electron diffraction, the researchers monitored the structure of a vanadium dioxide sample after excitation and found evidence of a metastable metallic phase that appears during the transition. Science , abc0652, this issue p. 352

Funder

National Science Foundation

U.S. Department of Energy

Air Force Office of Scientific Research

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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