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Electric-field control of exchange interactions
Physical Review B ( IF 3.7 ) Pub Date : 2021-11-30 , DOI: 10.1103/physrevb.104.174443 S. Mankovsky , E. Simon , S. Polesya , A. Marmodoro , H. Ebert
Physical Review B ( IF 3.7 ) Pub Date : 2021-11-30 , DOI: 10.1103/physrevb.104.174443 S. Mankovsky , E. Simon , S. Polesya , A. Marmodoro , H. Ebert
The impact of an applied electric field on exchange coupling parameters has been investigated based on first-principles electronic structure calculations by means of the Korringa-Kohn-Rostoker Green function method. The calculations have been performed for a Fe film, free-standing and deposited on two different substrates, having 1 monolayer (ML) thickness to minimize the effect of screening of the electric field typical for metallic systems. By comparing the results for the free-standing Fe ML with those for Fe on the various substrates, we could analyze the origin of the field-induced change of the exchange interactions. Compared to the free-standing Fe ML, in particular rather pronounced changes have been found for the Fe/Pt(111) system due to the localized electronic states at the Fe/Pt interface, which are strongly affected by the electric field and which play an important role for the Fe-Fe exchange interactions.
中文翻译:
交换相互作用的电场控制
基于第一性原理电子结构计算,通过 Korringa-Kohn-Rostoker 格林函数方法研究了外加电场对交换耦合参数的影响。已经对 Fe 膜进行了计算,该膜是独立的并沉积在两个不同的基板上,具有 1 个单层 (ML) 厚度,以最大限度地减少金属系统典型的电场屏蔽效应。通过比较独立的 Fe ML 与不同基材上的 Fe 的结果,我们可以分析场引起的交换相互作用变化的起源。与独立的 Fe ML 相比,由于 Fe/Pt 界面的局部电子态,Fe/Pt(111) 系统发生了相当明显的变化,
更新日期:2021-11-30
中文翻译:
交换相互作用的电场控制
基于第一性原理电子结构计算,通过 Korringa-Kohn-Rostoker 格林函数方法研究了外加电场对交换耦合参数的影响。已经对 Fe 膜进行了计算,该膜是独立的并沉积在两个不同的基板上,具有 1 个单层 (ML) 厚度,以最大限度地减少金属系统典型的电场屏蔽效应。通过比较独立的 Fe ML 与不同基材上的 Fe 的结果,我们可以分析场引起的交换相互作用变化的起源。与独立的 Fe ML 相比,由于 Fe/Pt 界面的局部电子态,Fe/Pt(111) 系统发生了相当明显的变化,