Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4517
Title: Predominantly superconducting origin of large energy gaps in underdoped Bi2Sr2CaCu2O8+? from tunneling spectroscopy
Authors: Miyakawa, Nobuaki
Zasadzinski, John F.
Özyüzer, Lütfi
Guptasarma, Prasenjit
Hinks, David G.
Kendziora, Christopher A.
Gray, Kenneth E.
Keywords: Superconducting materials
Josephson junction devices
Tunneling spectroscopy
Issue Date: Aug-1999
Publisher: American Physical Society
Source: Miyakawa, N., Zasadzinski, J. F., Özyüser, L., Guptasarma, P., Hinks, D. G., Kendziora, C. A., and Gray, K. E. (1999). Predominantly superconducting origin of large energy gaps in underdoped Bi2Sr2CaCu2O8+δ from tunneling spectroscopy. Physical Review Letters, 83(5), 1018-1021. doi:10.1103/PhysRevLett.83.1018
Abstract: New tunneling data are reported in Bi2Sr2CaCu2O8+δ which show quasiparticle excitation gaps, Δ, reaching values as high as 60 meV for underdoped crystals with Tc = 70 K. These energy gaps are nearly 3 times larger than those of overdoped crystals with similar Tc. Despite the large differences in gap magnitude, the tunneling spectra display qualitatively similar characteristics over the entire doping range. Detailed examination of the spectra, including the Josephson IcRn product measured in break junctions, indicates that these energy gaps are predominantly of superconducting origin.
URI: http://dx.doi.org/10.1103/PhysRevLett.83.1018
http://hdl.handle.net/11147/4517
ISSN: 0031-9007
0031-9007
1079-7114
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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