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Coherent potential approximation
About: Coherent potential approximation is a research topic. Over the lifetime, 1930 publications have been published within this topic receiving 36805 citations.
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TL;DR: In this paper, optical bandgap measurements for two amorphous alloy structures a-(SiC)x Ge1−xHy and a-Six Sn1−XHy have been performed for a wide range of germanium, tin and hydrogen concentrations.
Abstract: Optical bandgap measurements for two amorphous alloy structures a-(SiC)x Ge1−xHy and a-Six Sn1−xHy have been performed for a wide range of germanium, tin and hydrogen concentrations. The experimental measurements are in excellent agreement with the calculated optical bandgap and electronic density of states. The model uses the coherent potential approximation with diagonal disorder while the off-diagonal disorder is treated within the virtual crystal approximation. Photoluminescence measurements for (SiC)x Ge1−x Hy have identified phonon side bands attributed to carbon.
3 citations
TL;DR: In this paper, the decoupling procedure involved in the configurational average of the Kittler-Falicov method for alloys is discussed, and a relationship between this method and the coherent potential approximation is established.
Abstract: The decoupling procedure involved in the configurational average of the Kittler-Falicov method for alloys is discussed. As a result of this analysis, a relationship between this method and the coherent potential approximation is established.
3 citations
TL;DR: In this paper, the ab-initio structure calculation based on the Korring-Kohn-Rostoker (KKR) method combined with the coherent potential approximation (CPA) have been used.
3 citations
TL;DR: In this paper, the authors investigated ferromagnetic properties in the periodic Anderson model with diagonal disorder and showed that the disorder can be included in the calculation consistently, which turns out to be equivalent to the coherent potential approximation method.
3 citations
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TL;DR: In this article, the transition from topologically nontrivial to trivial state is studied by first-principles calculations on bulk zinc-blende type (Hg$1-x}$Zn$_x$) disordered alloy series.
Abstract: The transition from topologically nontrivial to a trivial state is studied by first-principles calculations on bulk zinc-blende type (Hg$_{1-x}$Zn$_x$)(Te$_{1-x}$S$_x$) disordered alloy series. The random chemical disorder was treated by means of the Coherent Potential Approximation. We found that although the phase transition occurs at the strongest disorder regime (${x\approx 0.5}$), it is still manifested by well-defined Bloch states forming a clear Dirac cone at the Fermi energy of the bulk disordered material. The computed residual resistivity tensor confirm the topologically-nontrivial state of the HgTe-rich (${x 0.5}$) by exhibiting the quantized behavior of the off-diagonal spin-projected component, independently on the concentration $x$.
3 citations