71 citations · 181 across the 12 of their papers we have counts for
6 papers · 1 filter
Electron coherent and incoherent pairing instabilities in inhomogeneous bipartite and nonbipartite nanoclusters
A. N. Kocharian, G. W. Fernando, K. Palandage +1
Exact calculations of collective excitations and charge/spin (pseudo)gaps in an ensemble of bipartite and nonbipartite clusters yield level crossing degeneracies, spin-charge separ…
Novel insights into charge and spin pairing instabilities in nanoclusters
A. N. Kocharian, G. W. Fernando, K. Palandage +1
Electron pairing and ferromagnetism in various cluster geometries are studied with emphasis on tetrahedron and square pyramid under variation of interaction strength, electron dopi…
Exact Thermodynamics of Pairing and Charge-spin Separation Crossovers in Small Hubbard Nanoclusters
A. N. Kocharian, G. W. Fernando, T. Wang +2
The exact numerical diagonalization and thermodynamics in an ensemble of small Hubbard clusters in the ground state and finite temperatures reveal intriguing insights into the nasc…
An exact study of charge-spin separation, pairing fluctuations and pseudogaps in four-site Hubbard clusters
Armen N. Kocharian, Gayanath W. Fernando, Kalum Palandage +1
An exact study of charge-spin separation, pairing fluctuations and pseudogaps is carried out by combining the analytical eigenvalues of the four-site Hubbard clusters with the gran…
Phase Diagrams and Charge-Spin Separation in Two and Four Site Hubbard Clusters
Armen N. Kocharian, Gayanath W. Fernando, James W. Davenport
The charge spin-separation, pseudogap formation and phase diagrams are studied in two and four site Hubbard clusters using analytical diagonalization and grand canonical ensemble m…
Monte Carlo study of the magnetic properties of the 3D Hubbard model
Isabel Campos, James W. Davenport
We investigate numerically the magnetic properties of the 3D Isotropic and Anisotropic Hubbard model at half-filling. The behavior of the transition temperature as a function of th…