Order parameter fluctuation effects in d-wave BCS superconductors

Abstract

We study order parameter fluctuation effects in the superconducting state as a possible precursor to the pseudogap phenomena. Using a low-energy effective theory in the d-wave BCS model, we self-consistently calculate the single-particle properties. We find that the fluctuations reduce the spectral gap, and the shape of the gap is deformed, showing reduced slope of the gap at the nodes. We also show the angle-dependence of the quasiparticle lifetime due to the fluctuations.

RevTex 4 pages; 4 epsf figures included; Extended discussions and added references

References in corpus (4)

• Vanishing of phase coherence in underdoped Bi_2Sr_2CaCu_2O_8+d
• Phase Fluctuations and Spectral Properties of Underdoped Cuprates
• The effect of phase fluctuations on the single-particle properties of the underdoped cuprates
• On the Relationship Between the Pseudo- and Superconducting Gaps: Effects of Residual Pairing Correlations Below Tc

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• Study of diamagnetic fluctuations in YBa_2Cu_3O_{7-x} and Bi_2Sr_2CaCu_2O_{8+x}: Possible observation of phase correlations persisting above T_c
• Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuations analysis of the experimental magnetization data
• Onset of phase correlations in YBa2Cu3O{7-x} as determined from reversible magnetization measurements
• Magnetic phase diagram of the layered superconductor Bi{2+x}Sr{2-x}CuO{6+δ} (Bi2201) with Tc~7 K