Magnetic fluctuations and nematic order in iron-based superconductors: Stability, short-time dynamics, transport and orbital correlations

铁基超导体中的磁涨落和向列序：稳定性、短时动力学、输运和轨道相关性

• 批准号: 237703666
• 负责人: Professor Dr. Ilya Eremin
• 金额: --
• 依托单位: Institut für Theorie der Kondensierten Materie (TKM)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237703666?language=en
• 关键词: Magnetic; fluctuations; nematic; order; iron

Our overall goal is to better understand the role of electronic correlations in the iron-based superconductors. It is established that effective one-particle theories are successful in predicting the main features of the band structure of the Fe-pnictides. Nevertheless, it becomes increasingly evident that the many-body effects are strong in these systems. Perhaps, the most prominent example of it is an observation of electronically driven nematicity in the parent compounds of ferro-pnictides supported by various experimental probes. In this proposal we aim at developing a microscopic description of nematic order and the associated strong magnetoelastic coupling. In addition we will develop the theoretical framework for a number of important experiments that are being used to probe nematicity: elastic properties, NMR spin lattice relaxation rate, the resistivity, Hall effect and thermopower anisotropy, and ultrafast optics experiments.

我们的总体目标是更好地了解电子相关性在基于铁的超导体中的作用。可以确定有效的单粒子理论成功地预测了Fe-Pnictides的带状结构的主要特征。然而，越来越明显的是，在这些系统中，多体效应很强。也许，它的最突出的例子是观察到由各种实验探针支持的铁刺球的母体化合物中电子驱动的nematicity的观察。在此提案中，我们旨在开发对列秩序和相关强磁弹性耦合的微观描述。此外，我们将开发用于许多用于探测何种性的重要实验的理论框架：弹性特性，NMR自旋晶格弛豫率，电阻率，HALL效应和热电器各向异性和超快光学实验。

项目成果

What drives nematic order in iron-based superconductors?

• DOI: 10.1038/nphys2877
• 发表时间: 2014-02-01
• 期刊: NATURE PHYSICS
• 影响因子: 19.6
• 作者: Fernandes, R. M.;Chubukov, A. V.;Schmalian, J.
• 通讯作者: Schmalian, J.

Pair breaking in multiorbital superconductors: An application to oxide interfaces

多轨道超导体中的电子对断裂：在氧化物界面上的应用

• DOI: 10.1103/physrevb.92.014518
• 发表时间: 2015
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: M. S. Scheurer;M. Hoyer;J. Schmalian
• 通讯作者: J. Schmalian

Nematic Resonance in the Raman Response of Iron-Based Superconductors.

• DOI: 10.1103/physrevlett.116.017001
• 发表时间: 2015-04
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Y. Gallais;I. Paul;L. Chauvière;J. Schmalian

Disorder-promoted C 4 -symmetric magnetic order in iron-based superconductors

• DOI: 10.1103/physrevb.93.144414
• 发表时间: 2015-12
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: M. Hoyer;R. Fernandes;A. Levchenko;J. Schmalian

Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides

铁磷族化合物拉曼响应函数中向列自由度的表现

• DOI: 10.1103/physrevb.92.075134
• 发表时间: 2015
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: U. Karahasanović;F. Kretzschmar;T. Böhm;R. Hackl;I. Paul;Y. Gallais;J. Schmalian
• 通讯作者: J. Schmalian