Incommensurate charge order phase in Fe2OBO3 due to geometrical frustration

[en] The temperature dependence of charge order in Fe2OBO3 was investigated by resistivity and differential scanning calorimetry measurements, Mossbauer spectroscopy, and synchrotron x-ray scattering, revealing an intermediate phase between room temperature and 340 K, characterized by coexisting mobile and immobile carriers, and by incommensurate superstructure modulations with temperature-dependent propagation vector (1/2, 0, tau) . The incommensurate modulations arise from specific antiphase boundaries with low energy cost due to geometrical charge frustration.

Disciplines :

Physics

Author, co-author :

Angst, M.

Hermann, Raphaël ; Université de Liège - ULiège > Département de physique > Département de physique

Schweika, W.

Kim, J *-W

Khalifah, P.

Xiang, H. J.

Whangbo, M *-H

Kim, D *-H

Sales, B. C.

Mandrus, D.

Language :

English

Title :

Incommensurate charge order phase in Fe2OBO3 due to geometrical frustration

Publication date :

2007

Journal title :

Physical Review Letters

ISSN :

0031-9007

eISSN :

1079-7114

Publisher :

American Physical Society, Ridge, United States - New York

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 13 December 2012

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