A model of the T-dependent pseudogap and its competition with superconductivity in copp er oxides

Abstract

Results for pseudogaps are obtained from a band model, where the stability of the gap depends on the amplitudes of vibrational displacements, or magnetic moments, and their coupling to electrons. A one-particle gap is favored by normal thermal excitations of phonons or spin waves. Another gap can be generated by spontaneous waves at lower temperature, if the electronic energy gain overcomes the elastic/magnetic energy needed for increased amplitudes of the oscillations. This state is characterized by charge or spin density waves. The pseudogap has many features in common with the superconducting gap, and the model lends support to the interpretation that the pseudogap is a precursor of, and competes with, superconducting pairing.

4 pages, 2 figures

References in corpus (5)

• Scale-free structural organization of oxygen interstitials in La2CuO4+y
• Effects of spin-phonon interaction on the properties of in high-T${}_C$ superconductors
• Properties of high-T${}_C$ copper oxides from the nearly-free electron model
• Mechanisms for higher $T_C$ in copper oxide superconductors; Ideas from band calculations
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Cited by in corpus (4)

• Breakdown of the Migdal approximation at Lifshitz transitions with giant zero-point motion in H3S superconductor
• Electronic structure and properties of superconducting materials with simple Fermi surfaces
• Theoretical aspects of simple and nested Fermi surfaces for superconductivity in doped semiconductors and high-$T_C$ cuprates
• Electronic structure, doping, order and disorder in cuprate superconductors