Spectral function of the electron in a superconducting resonating valence-band state

V. N. Muthukumar; Z. Y. Weng; D. N. Sheng

doi:10.1103/PhysRevB.65.214522

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Spectral function of the electron in a superconducting resonating valence-band state

V. N. Muthukumar, Z. Y. Weng, D. N. Sheng

DOI 10.1103/PhysRevB.65.214522 · Physical Review B

T1

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Abstract

We present a model calculation of the spectral function of an electron in a superconducting resonating valence-bond (RVB) state. The RVB state, described by the phase-string mean-field theory of the t−J model, is characterized by three important features: (i) spin-charge separation, (ii) short-range antiferromagnetic correlations, and (iii) holon condensation. We show that when a bare hole is created, as in photoemission spectroscopy for instance, the RVB background responds with an antiferromagnetic oscillation of the local spin density surrounding the hole. This leads to matrix element effects with definite experimental consequences. We compare our results with data obtained from angle resolved photoemission spectroscopy in superconducting Bi2Sr2CaCu2O8+δ at optimal doping concentration.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown