INTERNATIONAL JOURNAL OF MODERN PHYSICS B 32, 1850327 (2018)

ISSN: 0217-9792, SCI

Charge dynamics in strongly-correlated electronic systems

Nguen Dan Tung, Nikolay Plakida

We consider the dynamic charge susceptibility and the charge density waves in strongly-correlated electronic systems within the two-dimensional t-J-V model. Using the equa-tion of motion method for the relaxation functions in terms of the Hubbard operators, we calculate the static susceptibility and the spectrum of charge uctuations as func-tions of doped hole concentrations and temperature. Charge density waves emerge for a sufficiently strong intersite Coulomb interaction. Calculation of the dynamic charge susceptibility reveals a strong damping of charge density waves for a small hole doping and propagating high-energy charge excitations at large doping.

DOI: 10.1142/S0217979218503277

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