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Cover Picture: Observation of insulating–insulating monoclinic structural transition in macro‐sized VO 2 single crystals (Phys. Status Solidi RRL 3/2011)
Author(s) -
Mun Bongjin Simon,
Chen Kai,
Leem Youngchul,
Dejoie Catherine,
Tamura Nobumichi,
Kunz Martin,
Liu Zhi,
Grass Michael E.,
Park Changwoo,
Yoon Joonseok,
Lee Y. Yvette,
Ju Honglyoul
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201190006
Subject(s) - monoclinic crystal system , materials science , phase transition , metal–insulator transition , condensed matter physics , insulator (electricity) , crystallography , phase (matter) , crystal structure , chemistry , physics , metal , optoelectronics , metallurgy , organic chemistry
To clarify the origin of metal–insulator transition (MIT) in VO 2 , it is of crucial importance to under‐stand the interplay among monoclinic M1, monoclinic M2, and rutile R phases. The Letter by Bongjin Simon Mun et al. ( pp. 107–109 ) reports the unusual insula‐tor–insulator structural phase transition (SPT) of VO 2 single crystals, which involves monoclinic M1 and M2 phase. The VO 2 crystals exhibit an extremely abrupt MIT at 67.8 °C and an insulator–insulator transition (IIT) at ∼49 °C. Using synchrotron‐based X‐ray microdiffraction, it is found that the IIT in this VO 2 crystal is related to a SPT between the M2 and M1 phases while the MIT occurs with a SPT of M1 and R phase. Also, a stable M2 phase is found at room temperature without any presence of external stress, which has not been reported previously. The authors believe that further investigations on this intriguing system will not only enrich the fundamental understanding of the system, but also will be exploited in future technologies.