Normal and superconducting state electronic structure of iron based superconductors
铁基超导体常态和超导态电子结构
基本信息
- 批准号:EP/H025855/1
- 负责人:
- 金额:$ 70.97万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2010
- 资助国家:英国
- 起止时间:2010 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Superconductivity is a fascinating phenomenon giving rise to quantum coherence over vast distances (several hundred kilometres of wire). It also has many valuable practical applications - basically anything which uses electricity can in principle benefit from superconducting technology. The most obvious applications are lossless power transmission cables, very high efficiency power transformers and generators. These applications have been promised since the early days of superconductivity at the start of the 20th century, but are only now becoming practical 20 years after the discovery of materials which superconduct above the boiling point of liquid nitrogen (77 Kelvin). The discovery and refinement of new superconducting materials benefits immensely from improving our understanding of their fundamental physics - most importantly the reason for the formation of the coherent superconducting state. Despite more than twenty years of research there is still no consensus as to the mechanism of high temperature superconductivity in the famous copper oxide (cuprate) materials. The discovery just over one year ago of high temperature superconductivity in material containing the element iron was very surprising as the magnetism normally associated with iron is highly detrimental to the formation of the superconducting state. These materials are of great interest from a point of view of both the fundamental physics and potential applications. The former stems from several key similarities (and differences) with the cuprate superconductors - perhaps making these materials the 'Rosetta stone' that can be used to understand how electronic mechanisms can produce a high temperature superconducting state. The latter from the fact that some materials continue to superconduct even when subjected to the world most intense magnetic fields in excess of 60T.The research in this proposal aims to further our understanding of high temperature superconductivity and in particular iron-based superconductors by pursuing two related research paths. One path will address the nature of the superconductivity itself. By measuring the influence of temperature on the density of superconducting electrons, through measurement of properties such as the magnetic penetration depth (i.e., the fundamental ability of a superconductor to screen out an applied magnetic field) we can learn the microscopic properties of the electrons which carry the superconducting current. The other path will be to study the properties of the 'normal' metal state. By applying large magnetic field, the superconductivity can be suppressed (effectively turned off) and then we can study the non-superconducting normal metallic state of the materials. In sufficiently high field, characteristic periodic oscillations of the magnetisation as a function of field (the de Haas-van Alphen effect) reveal the exact momenta of the electrons that carry current and how this momentum varies as a function of direction. This determination of the 'electronic structure' of a metal is akin to knowing its DNA. By studying how this normal state electronic structure varies in the different materials and how this influences the superconducting properties it will be possible to build up a theoretical picture of the mechanism of high temperature superconductivity.
超导性是一种令人着迷的现象,它能在很远的距离(几百公里的电线)上产生量子相干。它也有许多有价值的实际应用-基本上任何用电的东西原则上都可以从超导技术中受益。最明显的应用是无损电力传输电缆,非常高效的电力变压器和发电机。这些应用从世纪初超导的早期就已经被承诺,但直到发现在液氮沸点(77开尔文)以上超导的材料20年后才成为现实。新超导材料的发现和改进极大地受益于提高我们对其基础物理的理解-最重要的是形成相干超导态的原因。尽管经过二十多年的研究,对于著名的氧化铜(铜酸盐)材料的高温超导机制仍然没有达成共识。一年多前,在含有铁元素的材料中发现了高温超导性,这是非常令人惊讶的,因为通常与铁有关的磁性对超导态的形成非常有害。从基础物理和潜在应用的角度来看,这些材料都非常有趣。前者源于与铜酸盐超导体的几个关键相似之处(和不同之处)-也许使这些材料成为“罗塞塔石碑”,可用于理解电子机制如何产生高温超导状态。后者是因为某些材料即使在超过60 T的世界上最强的磁场下也能继续超导。本提案中的研究旨在通过两条相关的研究路径来加深我们对高温超导性,特别是铁基超导体的理解。其中一条路将解决超导性本身的性质。通过测量温度对超导电子密度的影响,通过测量诸如磁穿透深度(即,超导体屏蔽外加磁场的基本能力),我们可以了解携带超导电流的电子的微观特性。另一条路将是研究“正常”金属态的性质。通过施加大磁场,可以抑制(有效关闭)超导电性,然后我们可以研究材料的非超导正常金属态。在足够高的磁场中,磁化强度作为磁场函数的特征周期性振荡(de Haas-van Alphen效应)揭示了携带电流的电子的确切动量以及该动量如何作为方向的函数变化。确定金属的“电子结构”类似于知道它的DNA。通过研究这种正常态的电子结构在不同材料中如何变化,以及它如何影响超导性质,将有可能建立高温超导机制的理论图景。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Nodal versus nodeless behaviors of the order parameters of LiFeP and LiFeAs superconductors from magnetic penetration-depth measurements.
- DOI:10.1103/physrevlett.108.047003
- 发表时间:2011-07
- 期刊:
- 影响因子:8.6
- 作者:K. Hashimoto;S. Kasahara;R. Katsumata;Y. Mizukami;M. Yamashita;H. Ikeda;T. Terashima;A. Carrington-A.-Ca
- 通讯作者:K. Hashimoto;S. Kasahara;R. Katsumata;Y. Mizukami;M. Yamashita;H. Ikeda;T. Terashima;A. Carrington-A.-Ca
Studies of the gap structure of iron-based superconductors using magnetic penetration depth
- DOI:10.1016/j.crhy.2011.03.001
- 发表时间:2011-06-01
- 期刊:
- 影响因子:1.4
- 作者:Carrington, Antony
- 通讯作者:Carrington, Antony
Cascade of field-induced magnetic transitions in a frustrated antiferromagnetic metal
- DOI:10.1103/physrevb.90.020401
- 发表时间:2014-07
- 期刊:
- 影响因子:3.7
- 作者:A. Coldea;A. Coldea;L. Seabra;A. McCollam;Antony Carrington;L. Malone;A. Bangura;A. Bangura;D. Vignolles;P. Rhee;Ross McDonald;T. Sörgel;Martin Jansen;N. Shannon;R. Coldea;R. Coldea
- 通讯作者:A. Coldea;A. Coldea;L. Seabra;A. McCollam;Antony Carrington;L. Malone;A. Bangura;A. Bangura;D. Vignolles;P. Rhee;Ross McDonald;T. Sörgel;Martin Jansen;N. Shannon;R. Coldea;R. Coldea
Iron-based superconductors in high magnetic fields
- DOI:10.1016/j.crhy.2012.07.003
- 发表时间:2013
- 期刊:
- 影响因子:1.4
- 作者:A. Coldea;D. Braithwaite;A. Carrington
- 通讯作者:A. Coldea;D. Braithwaite;A. Carrington
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Antony Carrington其他文献
銅酸化物超伝導体の擬ギャップ相におけるネマティック転移
铜酸盐超导体赝能隙相中的向列相转变
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
佐藤雄貴;下山祐介;笠原成;笠原裕一;芝内孝禎;西嵜照和;Antony Carrington;Carsten Putzke;松田祐司;笠原成 - 通讯作者:
笠原成
Angle Dependent Specific Heat Study of BaFe2(As0.7P0.3)
BaFe2(As0.7P0.3) 角度相关比热研究
- DOI:
- 发表时间:
2013 - 期刊:
- 影响因子:0
- 作者:
Liam Malone;Yuta Mizukami;Philip Walmsley;S. Kasahara; T. Shibauchi;Y. Matsuda;Antony Carrington - 通讯作者:
Antony Carrington
磁場侵入長による鉄砒素系超伝導体 BaFe2(As1-xPx)2単結晶の超伝導対称性の決定
磁场穿透深度测定铁砷超导体BaFe2(As1-xPx)2单晶的超导对称性
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:0
- 作者:
橋本顕一郎;利根川翔;井加田洗輔;Allensando Serafin;Antony Carrington;笠原成;寺嶋孝仁;竹屋浩幸;平田和人;芝内孝禎;松田祐司 - 通讯作者:
松田祐司
Dynamics of Charged Quantized Vortices(Invited), QFS2009 : International Symposium on Quantum Fluids and Solids
带电量子化涡动力学(特邀),QFS2009:量子流体与固体国际研讨会
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:0
- 作者:
橋本顕一郎;Alessaodro Serafin;Antony Carrington;岡崎竜二;利根川翔;勝股亮;山下穣;木方邦宏;李哲虎;伊豫彰;永崎洋;齊藤拓;深澤英人;小堀洋;池田浩章;芝内孝禎;松田祐司;M. Tsubota - 通讯作者:
M. Tsubota
パルスマグネットを用いた強磁場軟X線MCD測定技術の開発
利用脉冲磁体开发强磁场软X射线MCD测量技术
- DOI:
- 发表时间:
2010 - 期刊:
- 影响因子:0
- 作者:
橋本顕一郎;Allensando Serafin;Antony Carrington;笠原成;利根川翔;井加田洸輔;山下穣;池田浩章;寺嶋孝仁;芝内孝禎;松田祐司;中村哲也 - 通讯作者:
中村哲也
Antony Carrington的其他文献
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{{ truncateString('Antony Carrington', 18)}}的其他基金
Microcalorimetry In Pulsed Magnetic Fields
脉冲磁场中的微量热法
- 批准号:
EP/V048406/1 - 财政年份:2021
- 资助金额:
$ 70.97万 - 项目类别:
Research Grant
Superconductivity and Competing Orders in High Tc Cuprates
高温铜氧化物中的超导性和竞争秩序
- 批准号:
EP/R011141/1 - 财政年份:2018
- 资助金额:
$ 70.97万 - 项目类别:
Research Grant
High pressure studies of quantum criticality in unconventional superconductors
非常规超导体量子临界性的高压研究
- 批准号:
EP/L025736/1 - 财政年份:2014
- 资助金额:
$ 70.97万 - 项目类别:
Research Grant
Fermi Surface Reconstruction in Cuprate High Temperature Superconductors
铜酸盐高温超导体中的费米表面重构
- 批准号:
EP/K016709/1 - 财政年份:2013
- 资助金额:
$ 70.97万 - 项目类别:
Research Grant
Fermiology of High Temperature Superconductors
高温超导体的费米学
- 批准号:
EP/F038836/1 - 财政年份:2008
- 资助金额:
$ 70.97万 - 项目类别:
Research Grant
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