dc.contributor.author | Kuzmin, Alexei | |
dc.contributor.author | Anspoks, Andris | |
dc.contributor.author | Kalinko, Aleksandr | |
dc.contributor.author | Timoshenko, Janis | |
dc.contributor.author | Nataf, Lucie | |
dc.contributor.author | Baudelet, François | |
dc.contributor.author | Irifune, Tetsuo | |
dc.date.accessioned | 2020-08-26T10:12:31Z | |
dc.date.available | 2020-08-26T10:12:31Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0370-1972 | |
dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/52462 | |
dc.description | The authors are grateful to Professor Alain Polian for providing the NDAC cell. | en_US |
dc.description.abstract | High-pressure (0–26.7 GPa) Cu K-edge X-ray absorption spectroscopy is used to study possible structural modifications of anti-perovskite-type copper nitride (Cu3N) crystal lattice. The analysis of X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), based on theoretical full-multiple-scattering and single-scattering approaches, respectively, suggests that at all pressures the local atomic structure of Cu3N remains close to that in cubic (Formula presented.) phase. Therefore, the transition to metal state above 5 GPa, observed previously using pressure-dependent electrical resistance and optical absorption measurements, is explained by the band gap collapse due to a decrease of the unit cell volume. We found that the lattice parameter of Cu3N is reduced by ≈2% upon increasing pressure up to 26.7 GPa, and the structure is restored upon pressure release. | en_US |
dc.description.sponsorship | This study was supported by Latvian National Research program IMIS2. The experiment at the SOLEIL synchrotron radiation facility received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) CALIPSO under Grant agreement no. 312284; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Wiley-VCH Verlag | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
dc.relation.ispartofseries | Physica Status Solidi (B) Basic Research;255 (11), 1800073 | |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
dc.subject | Cu K-edge | en_US |
dc.subject | Cu3N | en_US |
dc.subject | EXAFS | en_US |
dc.subject | high-pressure | en_US |
dc.subject | XANES | en_US |
dc.title | Origin of Pressure-Induced Metallization in Cu3N: An X-ray Absorption Spectroscopy Study | en_US |
dc.type | info:eu-repo/semantics/article | en_US |
dc.identifier.doi | 10.1002/pssb.201800073 | |