In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2024-12-26 DOI:10.1103/physrevb.110.245139

C. E. Liu, C. N. Wu, J. Falke, C. F. Chang, C.-Y. Kuo, S. Yang, J. Y. Juang, C. Koz, U. Schwarz, C. T. Chen, L. H. Tjeng, S. G. Altendorf

{"title":"In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions","authors":"C. E. Liu, C. N. Wu, J. Falke, C. F. Chang, C.-Y. Kuo, S. Yang, J. Y. Juang, C. Koz, U. Schwarz, C. T. Chen, L. H. Tjeng, S. G. Altendorf","doi":"10.1103/physrevb.110.245139","DOIUrl":null,"url":null,"abstract":"Fe</a:mi>x</a:mi></a:msub>Te</a:mi></a:mrow></a:math> thin films were prepared on <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:msub><b:mi>SrTiO</b:mi><b:mn>3</b:mn></b:msub></b:math> (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using x-ray absorption spectroscopy at the Fe <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:msub><c:mi>L</c:mi><c:mrow><c:mn>2</c:mn><c:mo>,</c:mo><c:mn>3</c:mn></c:mrow></c:msub></c:math> and Te <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\"><d:msub><d:mi>M</d:mi><d:mrow><d:mn>4</d:mn><d:mo>,</d:mo><d:mn>5</d:mn></d:mrow></d:msub></d:math> edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:mo>≈</e:mo></e:math> 1) provides the sharpest spectral features, indicating that <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"><f:mrow><f:msub><f:mi>Fe</f:mi><f:mrow><f:mn>1.00</f:mn></f:mrow></f:msub><f:mi>Te</f:mi></f:mrow></f:math> can be synthesized as a thin film, although it is not possible in bulk. Published by the American Physical Society 2024 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"319 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review B","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevb.110.245139","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}

引用次数: 0

Abstract

FexTe thin films were prepared on SrTiO3 (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using x-ray absorption spectroscopy at the Fe L2,3 and Te M4,5 edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio ≈ 1) provides the sharpest spectral features, indicating that Fe1.00Te can be synthesized as a thin film, although it is not possible in bulk.

Published by the American Physical Society

2024

查看原文本刊更多论文

广泛Fe/Te成分外延fete薄膜的原位x射线吸收和光电子能谱

采用分子束外延的方法在SrTiO3（001）衬底上有序地逐层制备了fete薄膜。在Te限制生长状态下，通过调整Te通量来改变薄膜的组成。利用Fe L2,3和Te M4,5边的x射线吸收光谱和核心能级和价带的x射线光电子能谱系统地研究了电子结构的变化。我们发现经过优化的FeTe成分（Fe/Te比值≈1）提供了最清晰的光谱特征，这表明Fe1.00Te可以作为薄膜合成，尽管不可能批量合成。2024年由美国物理学会出版

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分钟内获得全文求助全文

来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter