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SM ISO690:2012 GOMIS, Oscar, VILAPLANA, Rosario Isabel, MANJON, Francisco Javier, RUIZ-FUERTES, Javier, PEREZ-GONZALEZ, Eduardo, LOPEZ-SOLANO, Javier, BANDIELLO, Enrico, ERRANDONEA, Daniel J.H., SEGURA, Alfredo, RODRIGUEZ-HERNANDEZ, Placida Rogelio, MUNOZ, Alfonso Gonzalez, URSAKI, Veacheslav, TIGINYANU, Ion. HgGa2Se4 under high pressure: An optical absorption study. In: Physica Status Solidi (B) Basic Research, 2015, vol. 252, pp. 2043-2051. ISSN 0370-1972. DOI: https://doi.org/10.1002/pssb.201451714 |
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Physica Status Solidi (B) Basic Research | |
Volumul 252 / 2015 / ISSN 0370-1972 | |
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DOI: https://doi.org/10.1002/pssb.201451714 | |
Pag. 2043-2051 | |
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Rezumat | |
High-pressure optical absorption measurements have been performed in defect chalcopyrite HgGa2Se4 to investigate the influence of pressure on the bandgap energy and its relation with the pressure-induced order-disorder processes that occur in this ordered-vacancy compound. Two different experiments have been carried out in which the sample undergoes either a partial or a total pressure-induced disorder process at 15.4 and 30.8GPa, respectively. It has been found that the direct bandgap energies of the recovered samples at 1GPa were around 0.15 and 0.23eV smaller than that of the original sample, respectively, and that both recovered samples have different pressure coefficients of the direct bandgap than the original sample. A comprehensive explanation for these results on the basis of pressure-induced order-disorder processes is provided. |
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Cuvinte-cheie Bandgap energy, Defect chalcopyrite, High pressure, optical properties, Order-disorder transitions |
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<meta name="citation_title" content="HgGa2Se4 under high pressure: An optical absorption study"> <meta name="citation_author" content="Gomis Oscar"> <meta name="citation_author" content="Vilaplana Rosario Isabel"> <meta name="citation_author" content="Manjon Francisco Javier"> <meta name="citation_author" content="Ruiz-Fuertes Javier"> <meta name="citation_author" content="Perez-Gonzalez Eduardo"> <meta name="citation_author" content="Lopez-Solano Javier"> <meta name="citation_author" content="Bandiello Enrico"> <meta name="citation_author" content="Errandonea Daniel J.H."> <meta name="citation_author" content="Segura Alfredo"> <meta name="citation_author" content="Rodriguez-Hernandez Placida Rogelio"> <meta name="citation_author" content="Munoz Alfonso Gonzalez"> <meta name="citation_author" content="Ursaki Veacheslav"> <meta name="citation_author" content="Tiginyanu Ion"> <meta name="citation_publication_date" content="2015/09/01"> <meta name="citation_journal_title" content="Physica Status Solidi (B) Basic Research"> <meta name="citation_firstpage" content="2043"> <meta name="citation_lastpage" content="2051"> <meta name="citation_pdf_url" content="https://ibn.idsi.md/sites/default/files/imag_file/HgGa2Se4%20under%20high%20pressure.pdf">