Superconducting Gap Anisotropy and Quasiparticle Interactions: A Doping Dependent Photoemission Study

1998/12/31 by J. Mesot, M. R. Norman, Hong Ding +16 · 7 citations
Materials Science · Physics and Astronomy · #Angle-resolved photoemission spectroscopy #Anisotropy #Condensed matter physics #Doping #Electronic structure #Iron-based superconductors research #Penetration depth #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Superconductivity #Superconductivity in MgB2 and Alloys #Superfluidity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.83.840

published as Phys. Rev. Lett. 83, 840 (1999) · 4 pages, 3 eps figs, manuscript and Fig. 3 significantly revised

arxiv created 1999/03/17 · openalex publication_date 1999/07/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple cosk_x\ensuremath-cosk_y form, which suggests an increasing importance of long range interactions as the insulator is approached.

Citations

• Unusual Superconducting State of Underdoped Cuprates
• Gap renormalization in dirty anisotropic superconductors: Implications for the order parameter of the cuprates
• Destruction of the Fermi surface in underdoped high-Tc superconductors

Cited by

• Effect of Umklapp Scattering on Magnetic Field Penetration Depth in High-TcCuprates
• The effect of collective spin-1 excitations on electronic spectra in high-Tcsuperconductors
• Quasiparticle Thermal Conductivity in the Vortex State of High-TcCuprates
• Estimation of the Surface-d to Bulk-s Crossover in the Macroscopic Superconducting Wavefunction in Cuprates
• Doping dependence of superconducting gap in YBa2Cu3Oy from universal heat transport
• Bosonic mode interpretation of novel scanning tunnelling microscopy and related experimental results, within boson–fermion modelling of cuprate high-temperature superconductivity
• Electronic structure of the cuprate superconducting and pseudogap phases from spectroscopic imaging STM