DIAGRAM TECHNIQUE FOR THE HUBBARD-MODEL .2. METAL-INSULATOR-TRANSITION
THEORETICAL AND MATHEMATICAL PHYSICS, cilt.85, sa.2, ss.1185-1192, 1990 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 85 Sayı: 2
- Basım Tarihi: 1990
- Doi Numarası: 10.1007/bf01086848
- Dergi Adı: THEORETICAL AND MATHEMATICAL PHYSICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1185-1192
- Kocaeli Üniversitesi Adresli: Evet
Özet
An approximate Dyson equation is formulated for the correlation Green's function and the free-energy diagrams corresponding to this approximation are summed. The basic equations that determine the Mott metal-insulator transition are established. The critical value of the Coulomb interaction is U(C) = W/2, where W is the width of the band.