Ten questions and answers about superconductivity

TL;DR

This paper discusses fundamental questions about superconductivity, proposing a hypothesis that the pairing gap must be near the Fermi level, and introduces a three-factor theory to explain high-temperature superconductivity.

Contribution

It introduces a hypothesis linking the pairing gap location to superconductivity and develops a three-factor theory to explain high-temperature superconductivity.

Findings

Superconductivity requires the pairing gap near the Fermi level.

The three-factor theory explains key aspects of high-temperature superconductivity.

The hypothesis extends to various superconductors.

Abstract

This work answers the basic questions of superconductivity in a question-and-answer format. We extend a basic hypothesis to various superconductors. This hypothesis is that superconductivity requires that the pairing gap locates around the Fermi level. On the basis of this hypothesis our calculations give the so-called three factor theory with which some key problems of the high temperature superconductivity are explained.