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https://locus.ufv.br//handle/123456789/18978
Tipo: | Artigo |
Título: | Linear magnetoresistivity in layered semimetallic CaAl 2 Si 2 |
Autor(es): | Costa, D. G. Capaz, Rodrigo B. Falconi, R. Strikos, S. ElMassalami, M. |
Abstract: | According to an earlier Abrikosov model, a positive, nonsaturating, linear magnetoresistivity (LMR) is expected in clean, low-carrier-density metals when measured at very low temperatures and under very high magnetic fields. Recently, a vast class of materials were shown to exhibit extraordinary high LMR but at conditions that deviate sharply from the above-mentioned Abrikosov-type conditions. Such deviations are often considered within either classical Parish-Littlewood scenario of random-conductivity network or within a quantum scenario of small-effective mass or low carriers at tiny pockets neighboring the Fermi surface. This work reports on a manifestation of novel example of a robust, but moderate, LMR up to ∼100 K in the diamagnetic, layered, compensated, semimetallic CaAl2Si2. We carried out extensive and systematic characterization of baric and thermal evolution of LMR together with first-principles electronic structure calculations based on density functional theory. Our analyses revealed strong correlations among the main parameters of LMR and, in addition, a presence of various transition/crossover events based on which a P − T phase diagram was constructed. We discuss whether CaAl2Si2 can be classified as a quantum Abrikosov or classical Parish-Littlewood LMR system. |
Palavras-chave: | Magnetoresistivity CaAl2Si2 |
Editor: | Scientific Reports |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.1038/s41598-018-21102-9 http://www.locus.ufv.br/handle/123456789/18978 |
Data do documento: | 6-Mar-2018 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
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artigo.pdf | texto completo | 2,03 MB | Adobe PDF | Visualizar/Abrir |
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