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Charge fluctuations and electron–phonon interaction in the finite- Hubbard model

✍ Scribed by E. Cappelluti; B. Cerruti; L. Pietronero


Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
176 KB
Volume
359-361
Category
Article
ISSN
0921-4526

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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