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

Bongjin Simon Mun; Kai Chen; Youngchul Leem; Catherine Dejoie; Nobumichi Tamura; Martin Kunz; Zhi Liu; Michael E. Grass; Changwoo Park; Joonseok Yoon; Y. Yvette Lee; Honglyoul Ju

doi:10.1002/pssr.201105011

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

Bongjin Simon Mun, Kai Chen, Youngchul Leem, Catherine Dejoie, Nobumichi Tamura, Martin Kunz, Zhi Liu, Michael E. Grass, Changwoo Park, Joonseok Yoon, Y. Yvette Lee, Honglyoul Ju

Department of Physics

Research output: Contribution to journal › Letter › peer-review

23 Citations (Scopus)

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. (

Original language	English
Pages (from-to)	107-109
Number of pages	3
Journal	Physica Status Solidi - Rapid Research Letters
Volume	5
Issue number	3
DOIs	https://doi.org/10.1002/pssr.201105011
Publication status	Published - 2011 Mar

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics

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10.1002/pssr.201105011

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title = "Observation of insulating-insulating monoclinic structural transition in macro-sized VO2 single crystals",

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. (",

author = "Mun, {Bongjin Simon} and Kai Chen and Youngchul Leem and Catherine Dejoie and Nobumichi Tamura and Martin Kunz and Zhi Liu and Grass, {Michael E.} and Changwoo Park and Joonseok Yoon and Lee, {Y. Yvette} and Honglyoul Ju",

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doi = "10.1002/pssr.201105011",

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T1 - Observation of insulating-insulating monoclinic structural transition in macro-sized VO2 single crystals

AU - Mun, Bongjin Simon

AU - Chen, Kai

AU - Leem, Youngchul

AU - Dejoie, Catherine

AU - Tamura, Nobumichi

AU - Kunz, Martin

AU - Liu, Zhi

AU - Grass, Michael E.

AU - Park, Changwoo

AU - Yoon, Joonseok

AU - Lee, Y. Yvette

AU - Ju, Honglyoul

PY - 2011/3

Y1 - 2011/3

N2 - 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. (

AB - 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. (

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

Abstract

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