Quasiparticle spectral weights of Gutzwiller-projected high-Tc superconductors

Samuel Bieri; Dmitri Ivanov

doi:10.1103/PhysRevB.75.035104

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Quasiparticle spectral weights of Gutzwiller-projected high-Tc superconductors

Samuel Bieri, Dmitri Ivanov

DOI 10.1103/PhysRevB.75.035104 · Physical Review B

T1

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Abstract

We analyze the electronic Green’s functions in the superconducting ground state of the t−J model using Gutzwiller-projected wave functions, and compare them to the conventional BCS form. Some of the properties of the BCS state are preserved by the projection: the total spectral weight is continuous around the quasiparticle node and approximately constant along the Fermi surface. On the other hand, the overall spectral weight is reduced by the projection with a momentum-dependent renormalization, and the projection produces electron-hole asymmetry in renormalization of the electron and hole spectral weights. The latter asymmetry leads to the bending of the effective Fermi surface, which we define as the locus of equal electron and hole spectral weight.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2223 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown