Europium-based iron pnictides: a unique laboratory for magnetism, superconductivity and structural effects

IF 19 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Reports on Progress in Physics Pub Date : 2017-01-01 DOI:10.1088/0034-4885/80/1/016501
S. Zapf, M. Dressel
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引用次数: 61

Abstract

Despite decades of intense research, the origin of high-temperature superconductivity in cuprates and iron-based compounds is still a mystery. Magnetism and superconductivity are traditionally antagonistic phenomena; nevertheless, there is basically no doubt left that unconventional superconductivity is closely linked to magnetism. But this is not the whole story; recently, also structural effects related to the so-called nematic phase gained considerable attention. In order to obtain more information about this peculiar interplay, systematic material research is one of the most important attempts, revealing from time to time unexpected effects. Europium-based iron pnictides are the latest example of such a completely paradigmatic material, as they display not only spin-density-wave and superconducting ground states, but also local Eu2+ magnetism at a similar temperature scale. Here we review recent experimental progress in determining the complex phase diagrams of europium-based iron pnictides. The conclusions drawn from the observations reach far beyond these model systems. Thus, although europium-based iron pnictides are very peculiar, they provide a unique platform to study the common interplay of structural-nematic, magnetic and electronic effects in high-temperature superconductors.
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铕基铁化合物:一个独特的磁性、超导性和结构效应实验室
尽管经过数十年的深入研究,铜酸盐和铁基化合物的高温超导性的起源仍然是一个谜。磁性和超导性传统上是对立的现象;然而,基本上毫无疑问,非常规的超导性与磁性密切相关。但这不是故事的全部;最近,与所谓的向列相有关的结构效应也得到了相当大的关注。为了获得更多关于这种特殊相互作用的信息,系统的材料研究是最重要的尝试之一,不时揭示意想不到的效果。铕基铁化合物是这种完全范例材料的最新例子,因为它们不仅表现出自旋密度波和超导基态,而且在相似的温度尺度下也表现出局部Eu2+磁性。本文综述了近年来在确定铕基铁化合物复相图方面的实验进展。从观测中得出的结论远远超出了这些模式系统。因此,尽管铕基铁化合物非常特殊,但它们为研究高温超导体中结构-向列、磁性和电子效应的共同相互作用提供了一个独特的平台。
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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来源期刊
Reports on Progress in Physics
Reports on Progress in Physics 物理-物理:综合
CiteScore
31.90
自引率
0.00%
发文量
45
审稿时长
6-12 weeks
期刊介绍: Reports on Progress in Physics is a highly selective journal with a mission to publish ground-breaking new research and authoritative invited reviews of the highest quality and significance across all areas of physics and related areas. Articles must be essential reading for specialists, and likely to be of broader multidisciplinary interest with the expectation for long-term scientific impact and influence on the current state and/or future direction of a field.
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