Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV3Sb5

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

Physical Review B Pub Date : 2025-04-09 DOI:10.1103/physrevb.111.l140101

Felix Kurtz, Gevin von Witte, Lukas Jehn, Alp Akbiyik, Igor Vinograd, Matthieu Le Tacon, Amir A. Haghighirad, Dong Chen, Chandra Shekhar, Claudia Felser, Claus Ropers

{"title":"Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV3Sb5","authors":"Felix Kurtz, Gevin von Witte, Lukas Jehn, Alp Akbiyik, Igor Vinograd, Matthieu Le Tacon, Amir A. Haghighirad, Dong Chen, Chandra Shekhar, Claudia Felser, Claus Ropers","doi":"10.1103/physrevb.111.l140101","DOIUrl":null,"url":null,"abstract":"The discovery of the kagome metal CsV</a:mi></a:mrow>3</a:mn></a:msub>Sb</a:mi></a:mrow>5</a:mn></a:msub></a:math> sparked broad interest, due to the coexistence of a charge density wave (CDW) phase and possible unconventional superconductivity in the material. In this Letter, we use low-energy electron diffraction (LEED) with a <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mi>µ</b:mi><b:mi mathvariant=\"normal\">m</b:mi></b:math>-sized electron beam to explore the periodic lattice distortion at the antimony-terminated surface in the CDW phase. We recorded high-quality backscattering diffraction patterns in ultrahigh vacuum from multiple cleaved samples. Unexpectedly, we did not find superstructure reflexes at intensity levels predicted from dynamical LEED calculations for the reported <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\"><d:mrow><d:mn>2</d:mn><d:mo>×</d:mo><d:mn>2</d:mn><d:mo>×</d:mo><d:mn>2</d:mn></d:mrow></d:math> bulk structure. Our results suggest that in <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:msub><e:mrow><e:mi>CsV</e:mi></e:mrow><e:mn>3</e:mn></e:msub><e:msub><e:mrow><e:mi>Sb</e:mi></e:mrow><e:mn>5</e:mn></e:msub></e:math> the periodic lattice distortion accompanying the CDW is less pronounced at Sb-terminated surfaces than in the bulk. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"39 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2025-04-09","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.111.l140101","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

The discovery of the kagome metal CsV3Sb5 sparked broad interest, due to the coexistence of a charge density wave (CDW) phase and possible unconventional superconductivity in the material. In this Letter, we use low-energy electron diffraction (LEED) with a µm-sized electron beam to explore the periodic lattice distortion at the antimony-terminated surface in the CDW phase. We recorded high-quality backscattering diffraction patterns in ultrahigh vacuum from multiple cleaved samples. Unexpectedly, we did not find superstructure reflexes at intensity levels predicted from dynamical LEED calculations for the reported 2×2×2 bulk structure. Our results suggest that in CsV3Sb5 the periodic lattice distortion accompanying the CDW is less pronounced at Sb-terminated surfaces than in the bulk.

Published by the American Physical Society

2025

查看原文本刊更多论文

在kagome金属CsV3Sb5的sb端端表面层内降低周期性晶格畸变的证据

kagome金属CsV3Sb5的发现引起了广泛的兴趣，因为材料中存在电荷密度波（CDW）相和可能的非常规超导性。在这篇论文中，我们使用µm大小的电子束的低能电子衍射（LEED）来探索CDW相中锑端表面的周期性晶格畸变。我们在超高真空条件下记录了多个劈裂样品的高质量后向散射衍射图。出乎意料的是，我们没有发现上层结构反射的强度水平预测从动态LEED计算为报道的2×2×2体结构。我们的结果表明，在CsV3Sb5中，伴随着CDW的周期性晶格畸变在sb端表面比在本体中不那么明显。2025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