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Critical and Gaussian conductivity fluctuations in YBa2Cu3O7−δ and Bi2Sr2CaCu2O8

✍ Scribed by P. Pureur; R.Menegotto Costa; P. Rodrigues Jr.; J.V. Kunzler; J. Schaf; L. Ghivelder; J.A. Campá; I. Rasines

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
139 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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✦ Synopsis

Systemauc conductivity lluctuatmn measurements are reported for polycryatalhne YBa2Cu3OT_ 8 and singlecrystal Bi2Sr2CaCu208. Gaussian and criucal regimes are observed For both systems, the crmcal exponents are consistent with s-wave pairmg.

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Superconducting energy gaps in YBa2Cu3O7
Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8
✍ T. Ekino; T. Minami; H. Fujii; J. Akimitsu 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 181 KB

We report tunneling measurements of the superconducting energy gaps in YBa.Cu307 and Bi2Sr.CaCthO 8 using b~eak junctions. The differential conductance d/fdV at T = 4.2 K shows no leakage around zero ba~s, while the t,,q~ -dge peaks m d//dV are somewhat broadened compared to the simple BCS density o