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Renormalization of the electron-phonon interaction: a reformulation of the BCS-gap equation

✍ Scribed by A. Hübsch; K. W. Becker


Book ID
111620753
Publisher
Springer
Year
2003
Tongue
English
Weight
154 KB
Volume
33
Category
Article
ISSN
1434-6036

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Renormalization of the electron–phonon i
✍ R. Citro; S. Cojocaru; M. Marinaro 📂 Article 📅 2005 🏛 Elsevier Science 🌐 English ⚖ 165 KB

We calculate the electron-phonon vertex in the two-dimensional Hubbard model by a strong coupling approach based on cumulant expansion. The role of the on-site Coulomb interaction on the coupling of the electrons to the Holstein phonons is investigated in different regions of the Brillouin zone. The