The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2022-10-24 DOI:10.1080/21663831.2023.2210606

T. Lojewski, Mohamed F. Elhanoty, L. Le Guyader, O. Grånäs, Naman Agarwal, C. Boeglin, R. Carley, A. Castoldi, C. David, C. Deiter, F. Döring, R. Engel, F. Erdinger, H. Fangohr, C. Fiorini, P. Fischer, N. Gerasimova, R. Gort, F. Degroot, K. Hansen, S. Hauf, D. Hickin, M. Izquierdo, B. V. Van Kuiken, Y. Kvashnin, C. Lambert, D. Lomidze, S. Maffessanti, L. Mercadier, G. Mercurio, P. Miedema, K. Ollefs, M. Pace, M. Porro, J. Rezvani, B. Rösner, N. Rothenbach, A. Samartsev, A. Scherz, J. Schlappa, C. Stamm, M. Teichmann, P. Thunström, M. Turcato, A. Yaroslavtsev, Jun Zhu, M. Beye, H. Wende, U. Bovensiepen, Olle Eriksson, A. Eschenlohr

{"title":"The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni","authors":"T. Lojewski, Mohamed F. Elhanoty, L. Le Guyader, O. Grånäs, Naman Agarwal, C. Boeglin, R. Carley, A. Castoldi, C. David, C. Deiter, F. Döring, R. Engel, F. Erdinger, H. Fangohr, C. Fiorini, P. Fischer, N. Gerasimova, R. Gort, F. Degroot, K. Hansen, S. Hauf, D. Hickin, M. Izquierdo, B. V. Van Kuiken, Y. Kvashnin, C. Lambert, D. Lomidze, S. Maffessanti, L. Mercadier, G. Mercurio, P. Miedema, K. Ollefs, M. Pace, M. Porro, J. Rezvani, B. Rösner, N. Rothenbach, A. Samartsev, A. Scherz, J. Schlappa, C. Stamm, M. Teichmann, P. Thunström, M. Turcato, A. Yaroslavtsev, Jun Zhu, M. Beye, H. Wende, U. Bovensiepen, Olle Eriksson, A. Eschenlohr","doi":"10.1080/21663831.2023.2210606","DOIUrl":null,"url":null,"abstract":"The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb repulsion. By combining high energy and temporal resolution in femtosecond time-resolved X-ray absorption spectroscopy with ab initio time-dependent density functional theory we analyze the electronic structure in fcc Ni on the time scale of these interactions in a pump-probe experiment. We distinguish transient broadening and energy shifts in the absorption spectra, which we demonstrate to be captured by electron repopulation respectively correlation-induced modifications of the electronic structure, requiring to take the local Coulomb interaction into account. GRAPHICAL ABSTRACT IMPACT STATEMENT We demonstrate that local correlations are essential for the transient electronic structure of optically excited Ni; paving the way for analyzing these interactions on their intrinsic timescales in correlated materials.","PeriodicalId":18291,"journal":{"name":"Materials Research Letters","volume":"11 1","pages":"655 - 661"},"PeriodicalIF":8.6000,"publicationDate":"2022-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/21663831.2023.2210606","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 6

Abstract

The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb repulsion. By combining high energy and temporal resolution in femtosecond time-resolved X-ray absorption spectroscopy with ab initio time-dependent density functional theory we analyze the electronic structure in fcc Ni on the time scale of these interactions in a pump-probe experiment. We distinguish transient broadening and energy shifts in the absorption spectra, which we demonstrate to be captured by electron repopulation respectively correlation-induced modifications of the electronic structure, requiring to take the local Coulomb interaction into account. GRAPHICAL ABSTRACT IMPACT STATEMENT We demonstrate that local correlations are essential for the transient electronic structure of optically excited Ni; paving the way for analyzing these interactions on their intrinsic timescales in correlated materials.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

fcc Ni中局域电子相关与超快自旋动力学的相互作用

金属铁磁体的复杂电子结构是由交换相互作用、导致能带形成的电子跳变和局部库仑排斥之间的平衡决定的。通过结合飞秒时间分辨x射线吸收光谱的高能量和时间分辨与从头算时间依赖密度泛函理论，在泵浦探针实验中分析了fcc Ni中这些相互作用的时间尺度上的电子结构。我们区分了吸收光谱中的瞬态展宽和能量位移，我们证明了它们分别是由电子重新填充引起的电子结构的相关修饰所捕获的，需要考虑局部库仑相互作用。我们证明了局部相关对于光激发镍的瞬态电子结构是必不可少的;为在相关材料的内在时间尺度上分析这些相互作用铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.