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Physica B Condensed Matter

Phase separation and pseudogap in electron-doped cuprates: A variational cluster perturbation analysis

Enrico Arrigoni, Markus Aichhorn

Published Feb 22, 2006• 1 citation
Publisher
DOI
10.1016/j.physb.2006.01.175

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Electron coherent and incoherent pairings and other types of correlations are studied exactly for the ensemble of small clusters with different geometries under variation of interaction strength, electron doping and temperature. Charge and spin collective excitations yield intriguing insights into level crossing degeneracies, phase separation and condensation. Criteria for spin-charge separation and recombination driven by interaction strength and temperature are found. Phase diagrams resemble a number of inhomogeneous, nanoscale phases and pseudogap regions seen recently in high TC cuprates, manganites, multiferroics and CMR nanomaterials.