Use este identificador para citar ou linkar para este item: 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
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