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Rapid Research Letter

Observation of insulating–insulating monoclinic structural transition in macro-sized VO2 single crystals

  1. Bongjin Simon Mun1,
  2. Kai Chen2,
  3. Youngchul Leem3,
  4. Catherine Dejoie2,
  5. Nobumichi Tamura2,
  6. Martin Kunz2,
  7. Zhi Liu2,
  8. Michael E. Grass1,2,
  9. Changwoo Park4,5,
  10. Joonseok Yoon3,
  11. Y. Yvette Lee3,
  12. Honglyoul Ju3,*

Article first published online: 21 JAN 2011

DOI: 10.1002/pssr.201105011

Issue

physica status solidi (RRL) - Rapid Research Letters

physica status solidi (RRL) - Rapid Research Letters

Volume 5, Issue 3, pages 107–109, March 2011

Additional Information

How to Cite

Mun, B. S., Chen, K., Leem, Y., Dejoie, C., Tamura, N., Kunz, M., Liu, Z., Grass, M. E., Park, C., Yoon, J., Lee, Y. Y. and Ju, H. (2011), Observation of insulating–insulating monoclinic structural transition in macro-sized VO2 single crystals. Phys. Status Solidi RRL, 5: 107–109. doi: 10.1002/pssr.201105011

Author Information

  1. 1

    Department of Applied Physics, Hanyang University, ERICA, Kyunggi-Do 426-791, Republic of Korea

  2. 2

    Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

  3. 3

    Department of Physics, Yonsei University, Seoul 120-749, Republic of Korea

  4. 4

    Division of Applied Chemistry and Biotechnology, Hanbat National University, Daejon 305-719, Republic of Korea

  5. 5

    Advanced Nano Products, Chungwon, Chungbuk 363-942, Republic of Korea

*Phone: +82-2-2123-2607, Fax: +82-2-392-1592

Publication History

  1. Issue published online: 1 MAR 2011
  2. Article first published online: 21 JAN 2011
  3. Manuscript Accepted: 17 JAN 2011
  4. Manuscript Revised: 16 JAN 2011
  5. Manuscript Received: 6 JAN 2011

Funded by

  • Advanced Nano Products Co., Ltd.
  • Korea Research Foundation (KRF) grant funded by the Korean government (MEST). Grant Number: 2009-0068720
  • Advanced Light Source at LBNL supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Science Division, of the U.S. Department of Energy. Grant Number: DE-AC02-05CH11231
  • Microdiffraction program at ALS on BL 12.3.2 made possible by NSF. Grant Number: 0416243

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Keywords:

  • vanadium dioxide;
  • metal-insulator transition;
  • X-ray microdiffraction;
  • structural phase transition

Abstract

VO2 single crystals with unprecedented quality, exhibiting a first-order metal–insulator transition (MIT) at 67.8 °C and an insulator –insulator transition (IIT) at ∼49 °C, are grown using a self-flux evaporation method. Using synchrotron-based X-ray microdiffraction analysis, it is shown that the IIT is related to a structural phase transition (SPT) from the monoclinic M2 phase to the M1 phase upon heating while the MIT occurs together with a SPT of M1 to the rutile R phase. All previous reports have shown that VO2 exists in the M1 phase at room temperature in contrast to the M2 phase observed in this work. We suggest that internal strain inside single crystal VO2 may generate the previously unobserved IIT and the unusual room temperature structure. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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