Publication

Electronic band structure study of (1,2,3) high-temperature superconductors

Giorgio Margaritondo
1988
Conference Papers

Abstract

A general discussion of the electronic band structure properties of YBa2Cu3O7-x and other (1,2,3) high-temperature superconductors is presented. Both the occupied and unoccupied density of states are discussed. The key experimental results and their relation to proposed superconducting mechanisms are examined. The discovery of high-temperature superconductors has evoked several proposed mechanisms. Among the most important properties that bear on the proposed mechanism is the material electronic structure. As a result, several experiments probing the occupied and unoccupied density of states have been performed on YBa2Cu3O7-x and other (1,2,3) high-temperature superconductors. The present article provides a critical overview of the results as they bear on the proposed mechanism. After outlining the pertinent theoretical issues, each experimental technique and the results obtained will be discussed

Official source

https://infoscience.epfl.ch/entities/publication/2abe3061-2dd5-4180-bd1f-e4706ebf8b4f

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Giorgio Margaritondo
1988
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2abe3061-2dd5-4180-bd1f-e4706ebf8b4f

About this result

Related concepts (32)

Electronic band structure

In solid-state physics, the electronic band structure (or simply band structure) of a solid describes the range of energy levels that electrons may have within it, as well as the ranges of energy that they may not have (called band gaps or forbidden bands). Band theory derives these bands and band gaps by examining the allowed quantum mechanical wave functions for an electron in a large, periodic lattice of atoms or molecules.

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.

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Electronic band structure study of (1,2,3) high-temperature superconductors

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