Spin Polarisation in Heusler alloy based spintronics systems probed by SPINHAXPES

SPINHAXPES 探测基于 Heusler 合金的自旋电子系统中的自旋极化

• 批准号: 131850600
• 负责人: Professor Dr. Hubert Ebert
• 金额: --
• 依托单位: Department Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/131850600?language=en
• 关键词: Spin; Polarisation; Heusler; alloy; based

Based on the one-step model of photo emission a description of spin-resolved hard X-ray photo emission (SPINHAXPES) will be developed that equally accounts for relativistic and correlation effects as well as disorder with respect to atomic and spin configurations. In particular, it will properly deal with specific features due to the use of the standing wave technique and high photon energy. The developments will be exploited for a detailed investigation on GMR- and TMR-devices based on half-metallic Heusler alloys. The focus will be put on the spin-polarisation at the Fermi-energy at interfaces because it is of central importance for spin-dependent transport. The influence of various distorting factors as structural imperfections or thermal fluctuations will be considered in a detailed way. Special emphasis will be put on a study on the spin polarisation at finite temperatures. For this, a variety of complementary approaches will be applied including a feed-back of the results of Monte Carlo simulations into electronic structure calculations. The planned investigations will clearly demonstrate the potential of SPINHAXPES as a new probe for the spin polarisation of buried interfaces and will at the same time directly support the complementary experimental work of the collaborators Inomata, Felser et al.

在光发射一步模型的基础上，将发展一种自旋分辨硬x射线光发射（SPINHAXPES）的描述，该描述同样考虑了相对论和相关效应以及原子和自旋构型的无序性。特别是，由于使用驻波技术和高光子能量，它将适当地处理特定的特征。这些进展将用于基于半金属Heusler合金的GMR-和tmr -器件的详细研究。重点将放在界面处费米能量处的自旋极化，因为它对自旋相关输运至关重要。各种畸变因素的影响，如结构缺陷或热波动将被详细地考虑。特别着重于有限温度下自旋极化的研究。为此，将应用多种互补方法，包括将蒙特卡罗模拟结果反馈到电子结构计算中。计划中的研究将清楚地证明SPINHAXPES作为埋藏界面自旋极化的新探针的潜力，同时将直接支持合作者Inomata， Felser等人的补充实验工作。

项目成果

One Step Model Description of HARPES: Inclusion of Disorder and Temperature Effects

HARPES 的一步模型描述：包含无序和温度影响

• DOI: 10.1007/978-3-319-24043-5_7
• 发表时间: 2016
• 作者: J. Braun;H. Ebert;J. Minár
• 通讯作者: J. Minár

Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation

• DOI: 10.1088/1367-2630/16/1/015005
• 发表时间: 2014-01-02
• 期刊: NEW JOURNAL OF PHYSICS
• 影响因子: 3.3
• 作者: Braun, J.;Miyamoto, K.;Minar, J.
• 通讯作者: Minar, J.

Momentum-resolved electronic structure at a buried interface from soft X-ray standing-wave angle-resolved photoemission

软 X 射线驻波角分辨光电发射在掩埋界面处的动量分辨电子结构

• DOI: 10.1209/0295-5075/104/17004
• 发表时间: 2013
• 期刊: Europhysics Letters
• 作者: A. X. Gray;J. Minr;L. Plucinski;M. Huijben;A. Bostwick;E. Rotenberg;S. Yang;J. Braun;A. Winkelmann;G. Conti;D. Eiteneer;A. Rattanachata;A. A. Greer;J. Ciston;C. Ophus;G. Rijnders;D. H. A. Blank;D. Doennig;R. Pentcheva;J. B. Kortright
• 通讯作者: J. B. Kortright