Strong- versus weak-coupling paradigms for cuprate superconductivity

Shahaf Asban, Meni Shay, Muntaser Naamneh, Tal Kirzhner, Amit Keren

Research output: Contribution to journalArticlepeer-review

Abstract

Absolute resistivity measurements as a function of temperature from optimally doped YBa2Cu3O7, La2 -xSrxCuO4, Bi2Sr2Ca 1Cu2O8-x, and (Ca0.1La 0.9)(Ba1.65La0.35)Cu3Oy thin films are reported. Special attention is given to the measurement geometrical factors and the resistivity slope between Tc and T *. The results are compared with a strong-coupling theory for the resistivity derivative near Tc, which is based on hard core bosons, and with several weak-coupling theories, which are BCS based. Surprisingly, our results agree with both paradigms. The implications of these findings and the missing calculations needed to distinguish between the two paradigms are discussed.

Original languageEnglish
Article number060502
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number6
DOIs
StatePublished - 2 Aug 2013
Externally publishedYes

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