Effect of the next-nearest-neighbor hopping on the charge collective modes in the paramagnetic phase of the Hubbard model

The charge dynamical response function of the \(t-t'-U\) Hubbard model is investigated on the square lattice in the thermodynamical limit. The correlation function is calculated from Gaussian fluctuations around the paramagnetic saddle-point within the Kotliar and Ruckenstein slave-boson repres...

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Veröffentlicht in:	arXiv.org 2022-04
Hauptverfasser:	Dao, Vu Hung, Frésard, Raymond
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic velocity Computer simulation Damping Doping Lattice vibration Mathematical models Physics - Strongly Correlated Electrons Response functions Saddle points Variation
Online-Zugang:	Volltext
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