Excitations in disordered superconductors

无序超导体中的激发

• 批准号: 240269471
• 负责人: Professor Dr. Götz Seibold
• 金额: --
• 依托单位: Dipartimento di Fisica
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/240269471?language=en
• 关键词: Excitations; disordered; superconductors

This application is aimed to support and continue a long-standing and acknowledged cooperation with the Solid State Theory group of the department of Physics at the University of Rome 'La Sapienza'.Within the past decade this cooperation resulted in numerous fruitful results and publications in the field of high-temperature superconductivity. The scientific aim of the present project is in understanding of excitations in disordered superconductors with regard to the following topics: (a) Evaluation of dynamical amplitude, phase and current fluctuations of strongly disordered superconductors close to the superconductor-insulator transition for understanding the unusual properties of spatial correlations in this regime. (b) Evaluation of transport properties and spin excitations in the spin glass phase of cuprate superconductors with regard to the proposal that these materials display a ferronematic state at low doping. These investigations are aimed to contribute to our understanding of the electronic properties of these materials.

该应用程序旨在支持和继续与罗马大学物理系固态理论小组长期和公认的合作。在过去的十年中，这种合作在高温超导领域取得了许多丰硕的成果和出版物。本项目的科学目的是了解无序超导体中的激励，涉及以下主题：(a)评估接近超导体-绝缘体跃迁的强无序超导体的动态振幅、相位和电流波动，以了解该状态中空间相关性的不寻常性质。(b)评价铜超导体自旋玻璃相的输运性质和自旋激发，并提出这些材料在低掺杂下显示铁态。这些研究旨在有助于我们对这些材料的电子特性的理解。

项目成果

Amplitude, density, and current correlations of strongly disordered superconductors

• DOI: 10.1103/physrevb.92.064512
• 发表时间: 2015-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: G. Seibold;L. Benfatto;C. Castellani;J. Lorenzana

Optical excitation of phase modes in strongly disordered superconductors

• DOI: 10.1103/physrevb.89.174506
• 发表时间: 2014-01
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: T. Cea;D. Bucheli;G. Seibold;L. Benfatto;J. Lorenzana;C. Castellani