32 citations · 46 across the 7 of their papers we have counts for
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Sound attenuation and velocity shift in antiferromagnetic spin-1/2 chains
Edmond Orignac, Emeric Caprani, Roberta Citro
We investigate ultrasound attenuation and sound velocity shift in antiferromagnetic spin-1/2 XXZ chains in magnetic field. We relate the sound velocity shift to derivatives of the…
Superconductivity in the repulsive Hubbard model on different geometries induced by density-assisted hopping
Franco T. Lisandrini, Edmond Orignac, Roberta Citro +2
We study the effect of density-assisted hopping on different dimerized lattice geometries, such as bilayers and ladder structures. We show analytically that the density-assisted ho…
Diagrammatic theory for Periodic Anderson Model: Stationary property of the thermodynamic potential
V. A. Moskalenko, L. A. Dohotaru, R. Citro
Diagrammatic theory for Periodic Anderson Model has been developed, supposing the Coulomb repulsion of localized electrons as a main parameter of the theory. electrons ar…
Diagrammatic theory for Anderson Impurity Model. Stationary property of the thermodynamic potential
V. A. Moskalenko, P. Entel, L. A. Dohotaru +1
A diagrammatic theory around atomic limit is proposed for normal state of Anderson Impurity Model. The new diagram method is based on the ordinary Wick's theorem for conduction ele…
Single-site Anderson model. II Perturbation theory of symmetric model
V. A. Moskalenko, P. Entel, D. F. Digor +2
The strong electron correlations caused by Coulomb interaction of impurity electrons are taken into account. The infinite series of diagrams containing irreducible Green's function…