Phys. Rev. B 94, 155101 (2016) | CAS產品查詢網
由ALKutepov著作·2016·被引用61次—Afewself-consistentschemestosolvetheHedinequationsarepresented.Theyincludevertexcorrectionsofdifferentcomplexity.
A few self-consistent schemes to solve the Hedin equations are presented. They include vertex corrections of different complexity. Commonly used quasiparticle approximation for the Greens function and static approximation for the screened interaction are avoided altogether. Using alkali metals Na and K as well as semiconductor Si and wide-gap insulator LiF as examples, it is shown that both the vertex corrections in the polarizability P and in the self-energy Σ are important. Particularly, vertex corrections in Σ with proper treatment of frequency dependence of the screened interaction always reduce calculated bandwidths/band gaps, improving the agreement with experiment. The complexity of the vertex included in P and in Σ can be different. Whereas in the case of polarizability one generally has to solve the Bethe-Salpeter equation for the ...
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Phys. Rev. B 94, 155101 (2016) | CAS產品查詢網
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【CAS標章編號】155101:保證責任台灣省嘉南羊乳運銷合作社
標章編號:155101品名:鮮羊乳廠商名稱:保證責任台灣省嘉南羊乳運銷合作社所在地區:嘉義縣詳細地址:太保市嘉太工業區光復路3號...