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Structural Phase Transitions in CsPbBr3
Abstract
Structural phase transitions in perovskite-type CsPbBr 3 have been investigated by neutron diffraction method. Phase transitions occur at 88°C and 130°C, which are respectively second and first order. The phase transition at 130°C is caused by condensation of the M 3 mode at the M point of the cubic Brillouin zone, while the one at 88°C results from condensation of the doubly degenerate R 25 -like mode ( Z 9 mode) at the Z point of the tetragonal Brillouin zone. Group theoretical considerations based on these results reveal that the crystal trans-forms from cubic perovskite structure (O h 1 - P m 3 m ) to tetragonal D 4h 5 - P 4/ m b m at 130°C and further to orthorhombic D 2h 16 - P m b n at 88°C. Possible atomic displacements induced at the phase transitions are obtained from the eigenvectors of the condensing modes.
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Metadata
- Authors
- Hirotsu, S., Harada, J., Iizumi, M., & Gesi, K.
- Venue
- Journal of the Physical Society of Japan
- Publisher
- Physical Society of Japan
- Published
- 1974-11
- Volume
- 37
- Issue
- 5
- Pages
- 1393-1398
- ISSN
- 0031-9015 (ISSN-L)
- 1347-4073
- OpenAlex
- W2182558273
- Cited by
- 287
- References
- 0
- FWCI
- 2.24
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hirotsu, S., Harada, J., Iizumi, M., & Gesi, K. (1974). Structural Phase Transitions in CsPbBr3. Journal of the Physical Society of Japan. https://doi.org/10.1143/jpsj.37.1393
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