Journal ArticleDOI
Bipolar doping and band-gap anomalies in delafossite transparent conductive oxides.
TLDR
It is shown that both properties are results of a large disparity between the fundamental gap and the apparent optical gap, a finding that could lead to a breakthrough in the study of bipolarly dopable wide-gap semiconductor oxides.Abstract:
Doping wide-gap materials p type is highly desirable but often difficult. This makes the recent discovery of p-type delafossite oxides, CuM(III)O2, very attractive. The CuM(III)O2 also show unique and unexplained physical properties: Increasing band gap from M(III) = Al,Ga, to In, not seen in conventional semiconductors. The largest gap CuInO2 can be mysteriously doped both n and p type but not the smaller gaps CuAlO2 and CuGaO2. Here, we show that both properties are results of a large disparity between the fundamental gap and the apparent optical gap, a finding that could lead to a breakthrough in the study of bipolarly dopable wide-gap semiconductor oxides.read more
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Gallium and Indium Alkoxides with Hydride, Cyclopentadienediide and Copper(I) tert-Butoxide as further Components
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Experimental and Computational Studies of the Optical Properties of CuAl1-xFexO2
Mina Aziziha,Saeed Akbarshahi,Suresh Pittala,Sayandeep Ghosh,Rishmali Sooriyagoda,Alessandra Romero,Subhash Thota,Alan D. Bristow,Mohindar S. Seehra,Matthew B. Johnson +9 more
TL;DR: In this paper, the effect of dilute alloying on the optical absorption of powdered CuAl1-xFexO2 (x = 0.0-1.0) is measured and compared to electronic band structures calculations using a generalized gradient approximation with Hubbard exchange-correlation parameter and spin.
Posted ContentDOI
Topological gelation of reconnecting polymers
TL;DR: A solution of semiflexible polymer rings undergoing generic cutting and reconnection operations under spherical confinement is investigated and it is found that in such systems there is a topological gelation transition, which can be triggered by increasing either the stiffness or concentration of the rings.
Posted ContentDOI
Turing pattern prediction in three-dimensional domains: the role of initial conditions and growth
TL;DR: In this paper , the authors used linear stability analysis and finite element modeling of a Turing system with Schnakenberg kinetics to investigate the effects of initial conditions and growing domains on the competition between admissible wave modes in 3D Turing pattern emergence.
Journal ArticleDOI
Solid-state synthesis and some properties of magnesium-doped copper aluminum oxides
TL;DR: In this paper, the authors investigate magnesium doping on the aluminum site as a means of producing higher electrical conductivity and optimized Seebeck coefficient, and the results suggest that while hot-pressing can achieve high density samples, secondary phases tend to form and lower the performance of the materials.