Publication

On some common features in high and low-Tc superconducting perovskites

Giorgio Margaritondo, László Forró, Helmuth Berger, Marco Grioni, Davor Pavuna, Daniel Ariosa Dupont
2000
Book Chapters

Abstract

Recent photoemission evidence for non-zero gap in highly overdoped Bi2Sr2-CaCu2O8+x, along the directions in the Brillouin zone where the d-wave gap exhibits nodes, is in accordance with more conventional behavior in strongly overdoped high-T-c cuprates. This differs from underdoped regime, where departures from Fermi-liquid (FL) behavior are found. Observed non-FL linear resistivity up to similar to 1050 K in low-T-c perovskite Sr2RuO4-delta is reminiscent of cuprates and implies some similarities between high- and low-T-c perovskites.

Official source

https://infoscience.epfl.ch/entities/publication/ddfb6af4-dfca-4ab7-895f-f0d6e5e791a7

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Giorgio Margaritondo, László Forró, Helmuth Berger, Marco Grioni, Davor Pavuna, Daniel Ariosa Dupont
2000
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ddfb6af4-dfca-4ab7-895f-f0d6e5e791a7

About this result

Related concepts (22)

Unconventional superconductor

Unconventional superconductors are materials that display superconductivity which does not conform to conventional BCS theory or its extensions. The superconducting properties of CeCu2Si2, a type of heavy fermion material, were reported in 1979 by Frank Steglich. For a long time it was believed that CeCu2Si2 was a singlet d-wave superconductor, but since the mid 2010s, this notion has been strongly contested. In the early eighties, many more unconventional, heavy fermion superconductors were discovered, including UBe13, UPt3 and URu2Si2.

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.

Related publications (7)

On some common features in high and low-Tc superconducting perovskites

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