Open AccessVolume dependent quasiparticle spectral weight in NiS2−xSexsystem
Author(s) -
Carlo Marini,
A. Perucchi,
P. Dore,
D. Topwal,
D. D. Sarma,
S. Lupi,
P. Postorino
Publication year - 2012
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/359/1/012012
Subject(s) - quasiparticle , volume (thermodynamics) , monotonic function , doping , infrared , reflectivity , metal , materials science , analytical chemistry (journal) , condensed matter physics , chemistry , physics , mineralogy , optics , metallurgy , thermodynamics , mathematics , environmental chemistry , superconductivity , mathematical analysis
We discuss the evolution of Infrared reflectivity at room temperature under various pressures (P) and Se alloying concentration in the strongly correlated NiS 2-xSe x pyrite. Measurements gave a complete picture of the optical response of the system on approaching the P-induced and Se-induced metallic state. A peculiar non-monotonic (V-shaped) volume dependence was found for the quasiparticle spectral weight of both pure and Se-doped compounds