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  Suppression of Jahn-Teller distortion and insulator-to-metal transition in LaMnO3 at high pressures

Loa, I., Adler, P., Grzechnik, A., Syassen, K., Schwarz, U., Hanfland, M., et al. (2002). Suppression of Jahn-Teller distortion and insulator-to-metal transition in LaMnO3 at high pressures. High Pressure Research, 22(2 Sp. Iss. SI), 325-329. doi:10.1080/08957950212777.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3159-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-0161-4
Genre: Journal Article

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 Creators:
Loa, I.1, Author              
Adler, P.2, Author              
Grzechnik, A., Author
Syassen, K.1, Author              
Schwarz, U.3, Author              
Hanfland, M.1, Author              
Rozenberg, G. K., Author
Gorodetsky, P., Author
Pasternak, M. P., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
3Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              

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Free keywords: LaMnO3; high pressure; phase transition; Jan-Teller effect; insulator-metal-transition; X-ray diffraction
 Abstract: Structural, vibrational and electronic properties of LaMnO3 under pressures up to 38 GPa have been studied by synchrotron X-ray powder diffraction, Raman spectroscopy, optical reflectivity, and transport measurements. The cooperative Jahn- Teller distortion of the MnO6 octahedra of the perovskite-type structure is continuously suppressed with increasing pressure, a process which appears completed at similar to20 GPa. The system remains insulating to 32 GPa, where an insulator-metal transition is observed. This transition is attributed to strengthened Mn-O-Mn interactions due to the increasing overlap of atomic orbitals.

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Language(s): eng - English
 Dates: 2002-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17800
ISI: 000176460700018
DOI: 10.1080/08957950212777
 Degree: -

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Title: High Pressure Research
  Alternative Title : High Pressure Res.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 22 (2 Sp. Iss. SI) Sequence Number: - Start / End Page: 325 - 329 Identifier: ISSN: 0895-7959