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Isostructural metal-insulator transition in VO 2

Journal Article · · Science
 [1];  [2];  [3];  [4];  [5];  [3];  [4];  [4];  [1];  [1];  [6];  [7];  [8];  [1];  [9];  [9];  [8];  [5];  [3];  [2] more »;  [1] « less
  1. Department of Materials Science and Engineering, University of Wisconsin, Madison, WI 53706, USA.
  2. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea.
  3. Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA.
  4. Department of Materials Modeling and Characterization, Korea Institute of Materials Science, Changwon 642-831, Korea.
  5. Department of Physics, University of Wisconsin, Madison, WI 53706, USA.
  6. Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA., School of Physical Sciences, Dublin City University, Dublin 9, Ireland.
  7. Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
  8. Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, NE 68588, USA.
  9. Department of Physics, Boise State University, Boise, ID 83725, USA.

The metal-insulator transition in correlated materials is usually coupled to a symmetry-lowering structural phase transition. This coupling not only complicates the understanding of the basic mechanism of this phenomenon but also limits the speed and endurance of prospective electronic devices. We demonstrate an isostructural, purely electronically driven metal-insulator transition in epitaxial heterostructures of an archetypal correlated material, vanadium dioxide. A combination of thin-film synthesis, structural and electrical characterizations, and theoretical modeling reveals that an interface interaction suppresses the electronic correlations without changing the crystal structure in this otherwise correlated insulator. This interaction stabilizes a nonequilibrium metallic phase and leads to an isostructural metal-insulator transition. This discovery will provide insights into phase transitions of correlated materials and may aid the design of device functionalities.

Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-06ER46327
OSTI ID:
1483924
Alternate ID(s):
OSTI ID: 1505612
Journal Information:
Science, Journal Name: Science Journal Issue: 6418 Vol. 362; ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)Copyright Statement
Country of Publication:
United States
Language:
English

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