Phase transition in bulk single crystals and thin films of VO2 by nanoscale infrared spectroscopy and imaging

Mengkun Liu; Aaron J. Sternbach; Martin Wagner; Tetiana V. Slusar; Tai Kong; Sergey L. Bud'ko; Salinporn Kittiwatanakul; M. M. Qazilbash; Alexander McLeod; Zhe Fei; Elsa Abreu; Jingdi Zhang; Michael Goldflam; Siyuan Dai; Guang Xin Ni; Jiwei Lu; Hans A. Bechtel; Michael C. Martin; Markus B. Raschke; Richard D. Averitt; Stuart A. Wolf; Hyun Tak Kim; Paul C. Canfield; D. N. Basov

doi:10.1103/PhysRevB.91.245155

Phase transition in bulk single crystals and thin films of VO₂ by nanoscale infrared spectroscopy and imaging

Mengkun Liu, Aaron J. Sternbach, Martin Wagner, Tetiana V. Slusar, Tai Kong, Sergey L. Bud'ko, Salinporn Kittiwatanakul, M. M. Qazilbash, Alexander McLeod, Zhe Fei, Elsa Abreu, Jingdi Zhang, Michael Goldflam, Siyuan Dai, Guang Xin Ni, Jiwei Lu, Hans A. Bechtel, Michael C. Martin, Markus B. Raschke, Richard D. AverittStuart A. Wolf, Hyun Tak Kim, Paul C. Canfield, D. N. Basov

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Abstract

We have systematically studied a variety of vanadium dioxide (VO₂) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectroscopic imaging techniques. By measuring the IR spectroscopic responses of electrons and phonons in VO₂ with sub-grain-size spatial resolution (∼20nm), we show that epitaxial strain in VO₂ thin films not only triggers spontaneous local phase separations, but also leads to intermediate electronic and lattice states that are intrinsically different from those found in bulk. Generalized rules of strain- and symmetry-dependent mesoscopic phase inhomogeneity are also discussed. These results set the stage for a comprehensive understanding of complex energy landscapes that may not be readily determined by macroscopic approaches.

Original language	English (US)
Article number	245155
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.91.245155
State	Published - Jun 29 2015
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.91.245155

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Liu, M., Sternbach, A. J., Wagner, M., Slusar, T. V., Kong, T., Bud'ko, S. L., Kittiwatanakul, S., Qazilbash, M. M., McLeod, A., Fei, Z., Abreu, E., Zhang, J., Goldflam, M., Dai, S., Ni, G. X., Lu, J., Bechtel, H. A., Martin, M. C., Raschke, M. B., ... Basov, D. N. (2015). Phase transition in bulk single crystals and thin films of VO₂ by nanoscale infrared spectroscopy and imaging. Physical Review B - Condensed Matter and Materials Physics, 91(24), Article 245155. https://doi.org/10.1103/PhysRevB.91.245155

Liu, M, Sternbach, AJ, Wagner, M, Slusar, TV, Kong, T, Bud'ko, SL, Kittiwatanakul, S, Qazilbash, MM, McLeod, A, Fei, Z, Abreu, E, Zhang, J, Goldflam, M, Dai, S, Ni, GX, Lu, J, Bechtel, HA, Martin, MC, Raschke, MB, Averitt, RD, Wolf, SA, Kim, HT, Canfield, PC & Basov, DN 2015, 'Phase transition in bulk single crystals and thin films of VO₂ by nanoscale infrared spectroscopy and imaging', Physical Review B - Condensed Matter and Materials Physics, vol. 91, no. 24, 245155. https://doi.org/10.1103/PhysRevB.91.245155

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title = "Phase transition in bulk single crystals and thin films of VO2 by nanoscale infrared spectroscopy and imaging",

abstract = "We have systematically studied a variety of vanadium dioxide (VO2) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectroscopic imaging techniques. By measuring the IR spectroscopic responses of electrons and phonons in VO2 with sub-grain-size spatial resolution (∼20nm), we show that epitaxial strain in VO2 thin films not only triggers spontaneous local phase separations, but also leads to intermediate electronic and lattice states that are intrinsically different from those found in bulk. Generalized rules of strain- and symmetry-dependent mesoscopic phase inhomogeneity are also discussed. These results set the stage for a comprehensive understanding of complex energy landscapes that may not be readily determined by macroscopic approaches.",

author = "Mengkun Liu and Sternbach, {Aaron J.} and Martin Wagner and Slusar, {Tetiana V.} and Tai Kong and Bud'ko, {Sergey L.} and Salinporn Kittiwatanakul and Qazilbash, {M. M.} and Alexander McLeod and Zhe Fei and Elsa Abreu and Jingdi Zhang and Michael Goldflam and Siyuan Dai and Ni, {Guang Xin} and Jiwei Lu and Bechtel, {Hans A.} and Martin, {Michael C.} and Raschke, {Markus B.} and Averitt, {Richard D.} and Wolf, {Stuart A.} and Kim, {Hyun Tak} and Canfield, {Paul C.} and Basov, {D. N.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = jun,

day = "29",

doi = "10.1103/PhysRevB.91.245155",

language = "English (US)",

volume = "91",

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T1 - Phase transition in bulk single crystals and thin films of VO2 by nanoscale infrared spectroscopy and imaging

AU - Liu, Mengkun

AU - Sternbach, Aaron J.

AU - Wagner, Martin

AU - Slusar, Tetiana V.

AU - Kong, Tai

AU - Bud'ko, Sergey L.

AU - Kittiwatanakul, Salinporn

AU - Qazilbash, M. M.

AU - McLeod, Alexander

AU - Fei, Zhe

AU - Abreu, Elsa

AU - Zhang, Jingdi

AU - Goldflam, Michael

AU - Dai, Siyuan

AU - Ni, Guang Xin

AU - Lu, Jiwei

AU - Bechtel, Hans A.

AU - Martin, Michael C.

AU - Raschke, Markus B.

AU - Averitt, Richard D.

AU - Wolf, Stuart A.

AU - Kim, Hyun Tak

AU - Canfield, Paul C.

AU - Basov, D. N.

PY - 2015/6/29

Y1 - 2015/6/29

N2 - We have systematically studied a variety of vanadium dioxide (VO2) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectroscopic imaging techniques. By measuring the IR spectroscopic responses of electrons and phonons in VO2 with sub-grain-size spatial resolution (∼20nm), we show that epitaxial strain in VO2 thin films not only triggers spontaneous local phase separations, but also leads to intermediate electronic and lattice states that are intrinsically different from those found in bulk. Generalized rules of strain- and symmetry-dependent mesoscopic phase inhomogeneity are also discussed. These results set the stage for a comprehensive understanding of complex energy landscapes that may not be readily determined by macroscopic approaches.

AB - We have systematically studied a variety of vanadium dioxide (VO2) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectroscopic imaging techniques. By measuring the IR spectroscopic responses of electrons and phonons in VO2 with sub-grain-size spatial resolution (∼20nm), we show that epitaxial strain in VO2 thin films not only triggers spontaneous local phase separations, but also leads to intermediate electronic and lattice states that are intrinsically different from those found in bulk. Generalized rules of strain- and symmetry-dependent mesoscopic phase inhomogeneity are also discussed. These results set the stage for a comprehensive understanding of complex energy landscapes that may not be readily determined by macroscopic approaches.

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Phase transition in bulk single crystals and thin films of VO₂ by nanoscale infrared spectroscopy and imaging

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