Publication

Temperature-dependent photoemission features for overdoped Bi2Sr2CaCu2O8+x cuprates

Giorgio Margaritondo, Helmuth Berger, Davor Pavuna, Mike Abrecht
2000
Journal Articles

Abstract

We report temperature-dependent angle-resolved photoemission spectra for overdoped Bi2Sr2CaCu2O8+alpha single-crystal samples. The data indicate that there is a special temperature (T+) where the spectral function changes intensity, and where the energy difference between the peak and dip features changes. The data also demonstrate that immediately above the superconducting transition temperature, the system exhibits a non-lorentzian lineshape. We discuss implications of the data.

Official source

https://infoscience.epfl.ch/entities/publication/b1e9576d-9257-4fcf-8e56-38ce0badc130

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Giorgio Margaritondo, Helmuth Berger, Davor Pavuna, Mike Abrecht
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/b1e9576d-9257-4fcf-8e56-38ce0badc130

About this result

Related concepts (20)

X-ray photoelectron spectroscopy

X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique based on the photoelectric effect that can identify the elements that exist within a material (elemental composition) or are covering its surface, as well as their chemical state, and the overall electronic structure and density of the electronic states in the material. XPS is a powerful measurement technique because it not only shows what elements are present, but also what other elements they are bonded to.

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.

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.

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Temperature-dependent photoemission features for overdoped Bi2Sr2CaCu2O8+x cuprates

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