Incommensurate charge order phase in Fe2OBO3 due to geometrical frustration

被引：37

作者：

Angst, M. ^{[1
]}

Hermann, R. P. ^{[2
,3
]}

Schweika, W. ^{[2
]}

Kim, J. -W. ^{[4
]}

Khalifah, P. ^{[5
,6
]}

Xiang, H. J. ^{[7
]}

Whangbo, M. -H. ^{[7
]}

Kim, D. -H. ^{[1
]}

Sales, B. C. ^{[1
]}

Mandrus, D. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[3] Univ Liege, Inst Phys, B-4000 Sart Tilman Par Liege, Belgium

[4] Ames Lab, Ames, IA 50010 USA

[5] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA

[6] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[7] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.99.256402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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