Toriyama, T., Nakao, A., Yamaki, Y., Nakao, H., Murakami, Y., Hasegawa, K., Isobe, M., Ueda, Y., Ushakov, A. V., Khomskii, D. I., Streltsov, S. V., Konishi, T. and Ohta, Y. (2011). Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O16. Phys. Rev. Lett., 107 (26). COLLEGE PK: AMER PHYSICAL SOC. ISSN 0031-9007

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Abstract

Synchrotron x-ray diffraction experiment shows that the metal-insulator transition occurring in a ferromagnetic state of a hollandite K2Cr8O16 is accompanied by a structural distortion from the tetragonal I4/m to monoclinic P112(1/a) phase with a root 2 X root 2 X 1 supercell. Detailed electronic structure calculations demonstrate that the metal-insulator transition is caused by a Peierls instability in the quasi-one-dimensional column structure made of four coupled Cr-O chains running in the c direction, leading to the formation of tetramers of Cr ions below the transition temperature. This provides a rare example of the Peierls transition of fully spin-polarized electron systems.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Toriyama, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakao, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yamaki, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakao, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murakami, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hasegawa, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isobe, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ueda, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ushakov, A. V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Khomskii, D. I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Streltsov, S. V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Konishi, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ohta, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-483313
DOI: 10.1103/PhysRevLett.107.266402
Journal or Publication Title: Phys. Rev. Lett.
Volume: 107
Number: 26
Date: 2011
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 0031-9007
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Physics, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/48331

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