Observation of all-in type tetrahedral displacements in nonmagnetic pyrochlore niobates

S. Torigoe, Y. Ishimoto, Y. Aoishi, H. Murakawa, D. Matsumura, K. Yoshii, Y. Yoneda, Y. Nishihata, K. Kodama, K. Tomiyasu, K. Ikeda, H. Nakao, Y. Nogami, N. Ikeda, T. Otomo, N. Hanasaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We observed all-in type Nb tetrahedral displacement in nonmagnetic pyrochlore niobates A2Nb2O7(A=Nd0.5Ca0.5 and Y0.5Ca0.5) through the analysis of the neutron pair distribution function and the extended x-ray absorption function spectroscopy. The all-in type Nb tetrahedral displacement, which has the character of a charge singlet state, is driven by the formation of the bonding orbital. The diffuse scattering in the x-ray diffraction, which has the resonant component in the Nb L3 edge, indicates that the all-in type Nb tetrahedral displacement has the periodicity with its short-range correlation.

Original languageEnglish
Article number085109
JournalPhysical Review B
Volume93
Issue number8
DOIs
Publication statusPublished - Feb 4 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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