Publication

Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime of the superconducting cuprates

Giorgio Margaritondo, Helmuth Berger
2004
Journal Articles

Abstract

Studying the nodal quasiparticles in superconducting cuprates by photoemission with highly improved momentum resolution, we show that a new "kink" feature in the scattering rate is a key to uncover the nature of electron correlations in these compounds. Our data provide evidence that the main doping independent contribution to the scattering can be well understood in terms of the conventional Fermi liquid model, while the additional doping dependent contribution has a magnetic origin. This sheds doubt on applicability of a phonon-mediated pairing mechanism to high-temperature superconductors.

Official source

https://infoscience.epfl.ch/entities/publication/ad5bbd42-045b-44be-af38-c70fa29a690d

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Giorgio Margaritondo, Helmuth Berger
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ad5bbd42-045b-44be-af38-c70fa29a690d

About this result

Related concepts (32)

High-temperature superconductivity

High-temperature superconductors (abbreviated high-Tc or HTS) are defined as materials with critical temperature (the temperature below which the material behaves as a superconductor) above , the boiling point of liquid nitrogen. They are only "high-temperature" relative to previously known superconductors, which function at even colder temperatures, close to absolute zero. The "high temperatures" are still far below ambient (room temperature), and therefore require cooling.

Superconductivity

Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero.

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

Related publications (32)

Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime of the superconducting cuprates

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