Correlation of Tunneling Spectra in Bi{sub 2} Sr{sub 2} CaCu{sub 2} O

Journal Article · Mon Aug 06 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.067005· OSTI ID:40277374

Zasadzinski, J F; Ozyuzer, L; Miyakawa, N; Gray, K E; Hinks, D G; Kendziora, C

New break-junction tunneling data are reported in Bi{sub 2}Sr {sub 2}CaCu{sub 2}O{sub 8+{delta}} over a wide range of hole concentration from underdoped (T{sub c}=74 K) to optimal doped (T{sub c}=95 K) to overdoped (T{sub c}=48 K) . The conductances exhibit sharp dips at a voltage, {Omega}/e , measured with respect to the superconducting gap. Clear trends are found such that the dip strength is maximum at optimal doping and that {Omega} scales as 4.9kT{sub c} 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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Sponsoring Organization: (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 40277374
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 87; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EXCITATION
RESONANCE
SPECTRA
SPIN
SUPERCONDUCTIVITY
TUNNELING