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Peierls Mechanism of the Metal-insulator Transition in Ferromagnetic Hollandite K 2Cr 8O 16
- Source :
- Phys Rev Lett; Physical Review Letters
- Publication Year :
- 2011
-
Abstract
- Synchrotron x-ray diffraction experiment shows that the metal-insulator transition occurring in a ferromagnetic state of a hollandite K 2Cr 8O 16 is accompanied by a structural distortion from the tetragonal I4/m to monoclinic P112 1/a phase with a √2×√2×1 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. © 2011 American Physical Society.
Details
- Database :
- OAIster
- Journal :
- Phys Rev Lett; Physical Review Letters
- Notes :
- 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., Ohta, Y.
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1346380719
- Document Type :
- Electronic Resource