Coupled spin, charge and orbital dynamics of low-dimensional cuprates

低维铜氧化物的自旋、电荷和轨道耦合动力学

• 批准号: 222254216
• 负责人: Professor Dr. Jochen Geck
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/222254216?language=en
• 关键词: Coupled; spin; charge; orbital; dynamics

Resonant inelastic x-ray scattering (RIXS) has been subject to tremendous developments in the last 2 years and is now a most powerful momentum resolved probe for spin, charge and orbital excitations in transition metal oxides. There is only one other experimental method that provides access to the dispersion of electronic excitations in these materials, namely electron-energy loss spectroscopy (EELS). However, while RIXS enables to probe magnetic and orbital excitations with outstanding sensitivity, EELS is ideally suited for studies of charge transfer excitations and plasmons. The idea of this project is to combine the new capabilities of RIXS with EELS and theory into a novel, comprehensive approach for the study of correlated electron materials. This approach will be applied to low-dimensional cuprates, which constitute well-defined model-systems of large scientific relevance. The first goal is to further establish the methodology. This will then pave the way to the second goal, which is the study of new cuprate materials: candidates for one-dimensional quantum spin-liquids and new multiple-leg ladder systems. With this unique combination of methods, we aim to gain new key insights into the collective spin, charge and orbital dynamics of cuprates and the coupling between the corresponding elementary excitations. Two worldwide leading facilities will be used: the RIXS facility of the PSI Villigen and the transmission EELS of the IFW Dresden. The close collaboration of PSI Villigen and IFW Dresden will bring together the expertise of both institutes and will create significant synergies.

共振非弹性 X 射线散射 (RIXS) 在过去 2 年中取得了巨大发展，现已成为过渡金属氧化物中自旋、电荷和轨道激发的最强大的动量分辨探针。只有另一种实验方法可以提供这些材料中电子激发色散的信息，即电子能量损失光谱（EELS）。然而，虽然 RIXS 能够以出色的灵敏度探测磁和轨道激发，但 EELS 非常适合电荷转移激发和等离子体激元的研究。该项目的想法是将 RIXS 的新功能与 EELS 和理论相结合，形成一种新颖、全面的方法来研究相关电子材料。这种方法将应用于低维铜酸盐，它们构成具有重大科学相关性的明确定义的模型系统。第一个目标是进一步建立方法论。这将为第二个目标铺平道路，即研究新的铜酸盐材料：一维量子自旋液体和新的多腿梯子系统的候选材料。通过这种独特的方法组合，我们的目标是获得对铜酸盐的集体自旋、电荷和轨道动力学以及相应的基本激发之间的耦合的新的关键见解。将使用两个世界领先的设施：PSI Villigen 的 RIXS 设施和 IFW Dresden 的传输 EELS。 PSI Villigen 和 IFW Dresden 的密切合作将汇集两个机构的专业知识，并产生显着的协同效应。

项目成果

Comment on ‘Oxygen vacancy-induced magnetic moment in edge-sharing CuO2 chains of Li2CuO2’

对“Li2CuO2 共边 CuO2 链中氧空位引起的磁矩”的评论

• DOI: 10.1088/1367-2630/aac159
• 发表时间: 2018
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: R. O. Kuzian;R. Klingeler;W. E. A. Lorenz;N. Wizent;S. Nishimoto;U. Nitzsche;H. Rosner;D. Milosavljevic;L. Hozoi;R. Yadav;J. Richter;A. Hauser;J. Geck;R. Hayn;V. Yushankhai;L. Siurakshina;C. Monney;T. Schmitt;J. Thar;G. Roth;T. Ito
• 通讯作者: T. Ito

Single crystal growth of spin-ladder compound La8Cu7O19 by the travelling-solvent floating zone method

行溶剂浮区法生长自旋梯化合物La8Cu7O19单晶

• DOI: 10.1016/j.jcrysgro.2016.05.005
• 发表时间: 2016
• 期刊: Journal of Crystal Growth
• 影响因子: 1.8
• 作者: A. Mohan;S. Singh;S. Partzsch;M. Zwiebler;J. Geck;S. Wurmehl;B. Büchner;C. Hess
• 通讯作者: C. Hess

Orbital breathing effects in the computation of x-ray d-ion spectra in solids by ab initio wave-function-based methods

基于波函数的从头算方法计算固体中 X 射线 d 离子谱时的轨道呼吸效应

• DOI: 10.1088/1361-648x/29/3/035502
• 发表时间: 2017
• 期刊: Journal of Physics: Condensed Matter
• 作者: N. A. Bogdanov;V. Bisogni;R. Kraus C. Monney;K. Zhou;T. Schmitt;J. Geck;A. O. Mitrushchenkov;H. Stoll;J. van den Brink;L. Hozoi
• 通讯作者: L. Hozoi

Probing inter- and intrachain Zhang-Rice excitons in Li2CuO2 and determining their binding energy

探测 Li2CuO2 中的链间和链内张赖斯激子并测定其结合能

• DOI: 10.1103/physrevb.94.165118
• 发表时间: 2016
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: C. Monney;V. Bisogni;K.-J. Zhou;R. Kraus;V. N. Strocov;G. Behr;S.-L. Drechsler;H. Rosner;S. Johnston;J. Geck;T. Schmitt
• 通讯作者: T. Schmitt