Phase Transition Switches Based on the Electrically induced Metal-Semiconductor Transition in VO(2)

  • Authors:
    Mehdi Z. Sadi (Univ. of Virginia)
    Publication ID:
    Publication Type:
    Received Date:
    Last Edit Date:
    2115.001 (University of Virginia)


Vanadium Oxide (VO(2)), which exhibits Metal Insulator transition (MIT), is a suitable material for making novel ultra low power switches. The MIT can be triggered by thermal or electrical stimulus. In case of thermal triggering, at a critical temperature of 340K, the VO(2) samples undergo a metal insulator transition where the resistance changes by 2 to 5 orders of magnitude depending on if the VO(2) sample is thin film or bulk. The thermal transition is accompanied by phase transition from monoclinic to tetragonal. In the
interest of making low power high speed switches, the triggering needs to be electronic. VO(2) undergoes a sharp metal-insulator transition (MIT) above room temperature at ultrafast timescales. This ultrafast resistance change opens up the possibility of making novel electronic switches, memory devices and sensors with VO(2). The MIT in VO(2) can be triggered by temperature induced structural phase transition known as Peierls or by electronic means known as Mott Hubbard transition.

4819 Emperor Blvd, Suite 300 Durham, NC 27703 Voice: (919) 941-9400 Fax: (919) 941-9450

Important Information for the SRC website. This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.