Spontaneous uniaxial strain and disappearance of the metal-insulator transition in monodisperse V 2O 3 nanocrystals

Y. Ishiwata, S. Suehiro, T. Kida, H. Ishii, Y. Tezuka, H. Oosato, E. Watanabe, D. Tsuya, Yuji Inagaki, Tatsuya Kawae, M. Nantoh, K. Ishibashi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Monodisperse V 2O 3 nanocrystals with diameters of 10.4 ± 1.8 nm have been synthesized by organic-phase synthesis. Systematic studies of their lattice parameters, electronic structure, and magnetism have shown the disappearance of the metal-insulator transition. The V 2O 3 nanocrystals show such a contraction along the c axis that the a 1g band is broadened, and mixing of the a 1g and egπ bands is enhanced. We conclude that this spontaneous uniaxial strain is unique for nanocrystals with a large surface area to volume ratio, and it stabilizes the metallic phase by gaining the free energy of electrons.

Original languageEnglish
Article number035449
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number3
DOIs
Publication statusPublished - Jul 30 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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