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

doi:10.1103/PhysRevB.93.085109

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

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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 language	English
Article number	085109
Journal	Physical Review B
Volume	93
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.93.085109
Publication status	Published - Feb 4 2016

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.93.085109

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Torigoe, S., Ishimoto, Y., Aoishi, Y., Murakawa, H., Matsumura, D., Yoshii, K., Yoneda, Y., Nishihata, Y., Kodama, K., Tomiyasu, K., Ikeda, K., Nakao, H., Nogami, Y., Ikeda, N., Otomo, T., & Hanasaki, N. (2016). Observation of all-in type tetrahedral displacements in nonmagnetic pyrochlore niobates. Physical Review B, 93(8), [085109]. https://doi.org/10.1103/PhysRevB.93.085109

Observation of all-in type tetrahedral displacements in nonmagnetic pyrochlore niobates. / Torigoe, S.; Ishimoto, Y.; Aoishi, Y.; Murakawa, H.; Matsumura, D.; Yoshii, K.; Yoneda, Y.; Nishihata, Y.; Kodama, K.; Tomiyasu, K.; Ikeda, K.; Nakao, H.; Nogami, Y.; Ikeda, N.; Otomo, T.; Hanasaki, N.

In: Physical Review B, Vol. 93, No. 8, 085109, 04.02.2016.

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

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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.",

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AU - Torigoe, S.

AU - Ishimoto, Y.

AU - Aoishi, Y.

AU - Murakawa, H.

AU - Matsumura, D.

AU - Yoshii, K.

AU - Yoneda, Y.

AU - Nishihata, Y.

AU - Kodama, K.

AU - Tomiyasu, K.

AU - Ikeda, K.

AU - Nakao, H.

AU - Nogami, Y.

AU - Ikeda, N.

AU - Otomo, T.

AU - Hanasaki, N.

PY - 2016/2/4

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N2 - 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.

AB - 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.

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

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