Phys. Rev. Lett. 87, 067005 (2001) [4 pages]Correlation of Tunneling Spectra in Bi2Sr2CaCu2O8+δ with the Resonance Spin ExcitationReceived 16 October 2000; published 23 July 2001 New break-junction tunneling data are reported in Bi2Sr2CaCu2O8+δ over a wide range of hole concentration from underdoped (Tc = 74 K) to optimal doped (Tc = 95 K) to overdoped (Tc = 48 K). The conductances exhibit sharp dips at a voltage, Ω/e, measured with respect to the superconducting gap. Clear trends are found such that the dip strength is maximum at optimal doping and that Ω scales as 4.9kTc over the entire doping range. These features link the dip to the resonance spin excitation and suggest quasiparticle interactions with this mode are important for superconductivity. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.067005
DOI:
10.1103/PhysRevLett.87.067005
PACS:
74.50.+r, 74.25.Dw, 74.62.Dh, 74.72.Hs
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