Strong- versus weak-coupling paradigms for cuprate superconductivity

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

doi:10.1103/PhysRevB.88.060502

Strong- versus weak-coupling paradigms for cuprate superconductivity

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

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Absolute resistivity measurements as a function of temperature from optimally doped YBa²Cu³O7_-δ, La2 _-xSr^xCuO⁴, Bi²Sr²Ca ¹Cu²O8_-x, and (Ca_0.1La _0.9)(Ba_1.65La_0.35)Cu³O^y thin films are reported. Special attention is given to the measurement geometrical factors and the resistivity slope between T_c and T ^*. The results are compared with a strong-coupling theory for the resistivity derivative near T_c, 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 language	English
Article number	060502
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.88.060502
State	Published - 2 Aug 2013
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Strong- versus weak-coupling paradigms for cuprate superconductivity",

abstract = "Absolute resistivity measurements as a function of temperature from optimally doped YBa2Cu3O7-δ, 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.",

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AU - Asban, Shahaf

AU - Shay, Meni

AU - Naamneh, Muntaser

AU - Kirzhner, Tal

AU - Keren, Amit

PY - 2013/8/2

Y1 - 2013/8/2

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AB - Absolute resistivity measurements as a function of temperature from optimally doped YBa2Cu3O7-δ, 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.

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Strong- versus weak-coupling paradigms for cuprate superconductivity

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