Materials (II)

V. Kresin, S. Ovchinnikov, S. Wolf
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引用次数: 2

Abstract

This chapter describes the properties of a number of interesting superconducting materials. The study of phonon-mediated superconductors, such as A-15 materials and MgB2, flourished after the discovery of the high-Tc hydrides. At present, this family displays, under high pressure, record values of Tc close to room temperature. Other interesting systems, such as pnictides, heavy fermions, and ruthenates, with their peculiar interplay of superconductivity and magnetism, are also described. Fe-based superconductors, which were recently discovered, have relatively high Tc at ambient pressure. They display a two-gap energy spectrum. Pairing in intercalated nitrides is mainly provided by acoustic plasmons. Tungsten oxides represent a new family of oxides containing elements other than copper; they form filamentary structures. A special class is formed by topological superconductors; usually their properties are caused by odd-parity pairing. The presence of the states inside of the energy gap make these superconductors similar to topological insulators.
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材料(2)
本章描述了一些有趣的超导材料的性质。声子介导超导体的研究,如A-15材料和MgB2,在发现高tc氢化物后蓬勃发展。目前,该系列显示器在高压下,Tc的记录值接近室温。其他有趣的系统,如质子、重费米子和钌酸盐,它们具有超导性和磁性的特殊相互作用,也被描述。最近发现的铁基超导体在环境压力下具有相对较高的Tc。它们显示出双间隙能谱。插层氮化物中的配对主要是由声等离子体提供的。钨氧化物是一种含有铜以外元素的新型氧化物;它们形成丝状结构。一个特殊的类别是由拓扑超导体形成的;通常它们的性质是由奇偶校验对引起的。能隙内部状态的存在使这些超导体类似于拓扑绝缘体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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