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In this paper, Bi1–xPbxCuOS samples (0 ≤ x ≤ 0.05) have been synthesized with a simple and scalable ball-milling process, followed by a reactive Spark Plasma Sintering. Our results highlight that, Pb for Bi substitution increases the charge carriers concentration by more than 2 orders of magnitude from 1.4 × 1017 cm–3 to 2.6 × 1019 cm–3 for x = 0 and x = 0.05, respectively. As a result, the electrical resistivity is divided by more than 50 at room temperature and the Seebeck coefficient drops from 707 μV K–1 to 265 μV K–1 where our experimental results are supported with density functional theory (DFT) calculations. Electronic structure calculations show that, just below the top of the valence band, several other bands are present and may contribute to the transport properties with appropriate tuning of the heavy-light valence band and the position of the Fermi level. Pb doping increases the number of holes pockets and several band degeneracies appear around the Fermi level, leading to a drastic enhanceme...
| Authors: | Jean-Baptiste Labégorre; Rabih Al Rahal Al Orabi; Agathe Virfeu; Jacinthe Gamon; Philippe Barboux; Lauriane Pautrot-d’Alençon; Thierry Le Mercier; David Berthebaud; Antoine Maignan; Emmanuel Guilmeau | |
| Journal: | Chemistry of Materials | |
| Year: | 2018 | |
| DOI: | 10.1021/acs.chemmater.7b04989 | |
| Publication date: | 19-Jan-2018 |
We recently generalized the formerly alignment-dependent multivariate image analysis applied to quantitative structure–activity relationships (MIA-QSAR) method through the application of the discrete Fourier transform (DFT), allowing for its application to noncongruent and structurally dive ... more
Proteomic Analysis of the Downstream Signaling Network of PARP1
Poly-ADP-ribosylation (PARylation) is a protein posttranslational modification (PTM) that is critically involved in many biological processes that are linked to cell stress responses. It is catalyzed by a class of enzymes known as poly-ADP-ribose polymerases (PARPs). In particular, PARP1 is ... more
Oxygen Activation and Energy Conservation by Cytochrome c Oxidase
This review focuses on the type A cytochrome c oxidases (CcO), which are found in all mitochondria and also in several aerobic bacteria. CcO catalyzes the respiratory reduction of dioxygen (O2) to water by an intriguing mechanism, the details of which are fairly well understood today as a r ... more
Rohm and Haas Powder Coatings is delighted to announce that its Reading, Pennsylvania, facility is the first site in the world to receive the RCMS® Site Certification awarded by the American Chemical Council (ACC). When Raj Gupta, Chairman and CEO of Rohm and Haas Company, became Chairman ... more
American Chemical Society Publications
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