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Data for Pressure-induced shift of effective Ce valence, Fermi energy and phase boundaries in CeOs4Sb12
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Gotze, Kathrin, Pearce, Matthew J., Coak, Matthew John, Goddard, Paul, Grockowiak, Audrey, Coniglio, William, Tozer, Stanley, Graf, David, Maple, M Brian, Ho, Pei-Chun, Brown, Matthew and Singleton, John (2022) Data for Pressure-induced shift of effective Ce valence, Fermi energy and phase boundaries in CeOs4Sb12. [Dataset]
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Official URL: http://wrap.warwick.ac.uk/164216/
Abstract
CeOs4Sb12, a member of the skutterudite family, has an unusual semimetallic low-temperature L-phase that inhabits a wedge-like area of the field H - temperature T phase diagram. We have conducted measurements of electrical transport and megahertz conductivity on CeOs4Sb12 single crystals under pressures of up to 3 GPa and in high magnetic fields of up to 41 T to investigate the influence of pressure on the different H-T phase boundaries. While the high-temperature valence transition between the metallic H-phase and the L-phase is shifted to higher T by pressures of the order of 1 GPa, we observed only a marginal suppression of the S-phase that is found below 1 K for pressures of up to 1.91 GPa. High-field quantum oscillations have been observed for pressures up to 3.0 GPa and the Fermi surface of the high-field side of the H-phase is found to show a surprising decrease in size with increasing pressure, implying a change in electronic structure rather than a mere contraction of lattice parameters. We evaluate the field-dependence of the effective masses for different pressures and also reflect on the sample dependence of some of the properties of CeOs4Sb12 which appears to be limited to the low-field region.
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| Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Cerium, Valence fluctuations, Skutterudite, Semimetals | |||||||||||||||||||||||||||||||||
| Publisher: | University of Warwick, Department of Physics | |||||||||||||||||||||||||||||||||
| Official Date: | 26 April 2022 | |||||||||||||||||||||||||||||||||
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| Status: | Not Peer Reviewed | |||||||||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||||||||
| Media of Output (format): | .DAT | |||||||||||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||||||||||||||
| Copyright Holders: | University of Warwick | |||||||||||||||||||||||||||||||||
| Description: | Files represent: |
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| Date of first compliant deposit: | 5 April 2022 | |||||||||||||||||||||||||||||||||
| Date of first compliant Open Access: | 26 April 2022 | |||||||||||||||||||||||||||||||||
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