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Topological surface states and weak thermal phonon anharmonicity of low-lying phonons in GeSb2Te4
2023-08-01
发表期刊PHYSICAL REVIEW B (IF:3.2[JCR-2023],3.3[5-Year])
ISSN2469-9950
EISSN2469-9969
卷号108期号:5
发表状态已发表
DOI10.1103/PhysRevB.108.054311
摘要

Recently, solid crystalline GeSb2Te4 was found to host topological surface states and low lattice thermal conductivity. In this work, we conducted comprehensive investigations on the electronic structures and lattice dynamics of GeSb2Te4. By combining synchrotron-based and spin-resolved angle-resolved photoemission spectroscopy and first-principles calculations, we observed distinctive topological surface states with significant spin polarization near the Fermi level. Furthermore, our temperature-dependent Raman scattering measurements revealed weak changes in linewidths of low-energy optical modes, indicating the weak temperature-dependent phonon anharmonicity of those modes. This finding is further supported by our lattice thermal conductivity calculation, which explains the minor variation in lattice thermal conduction in the high-temperature region. Our study sheds light on the exotic electronic and lattice dynamics of GeSb2Te4, potentially leading to new insights into its technological applications. © 2023 American Physical Society.

关键词Antimony compounds Crystal lattices Electronic structure Germanium compounds Phonons Photoelectron spectroscopy Spin polarization Surface states Tellurium compounds Thermal conductivity Topology Angle resolved photoemission spectroscopy Anharmonicities Electronic.structure First principle calculations Lattice thermal conductivity Raman Scattering measurements Solid crystalline Spin-polarization Temperature dependent Raman scattering Thermal phonons
收录类别EI
语种英语
出版者American Physical Society
EI入藏号20233614664676
EI主题词Germanium alloys
EI分类号549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 641.1 Thermodynamics ; 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory ; 931 Classical Physics ; Quantum Theory ; Relativity ; 932 High Energy Physics ; Nuclear Physics ; Plasma Physics ; 932.1 High Energy Physics ; 933.1.1 Crystal Lattice
原始文献类型Journal article (JA)
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/329005
专题物质科学与技术学院
物质科学与技术学院_特聘教授组_乔山组
作者单位
1.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui; 230026, China;
2.Hefei Innovation Research Institute, Beihang University, Hefei, Anhui; 230013, China;
3.Institute of Engineering Innovation, Graduate School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo; 113-0032, Japan;
4.Interdisciplinary Center for Fundamental and Frontier Sciences, Nanjing University of Science and Technology, Jiangyin, Jiangsu; 214443, China;
5.State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai; 200050, China;
6.Materials & Life Science Division, J-PARC Center, High Energy Accelerator Research Organization (KEK), Tokai, Ibaraki; 319-1106, Japan;
7.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China;
8.Cas Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui; 230026, China;
9.Hefei National Laboratory, University of Science and Technology of China, Hefei; 230088, China;
10.Collaborative Innovation Center of Advanced Microstructures, Nanjing; 210093, China
推荐引用方式
GB/T 7714
Wu, Peng,Li, Tongrui,Zhang, Bo,et al. Topological surface states and weak thermal phonon anharmonicity of low-lying phonons in GeSb2Te4[J]. PHYSICAL REVIEW B,2023,108(5).
APA Wu, Peng.,Li, Tongrui.,Zhang, Bo.,Sun, Jie.,Cui, Shengtao.,...&Sun, Zhe.(2023).Topological surface states and weak thermal phonon anharmonicity of low-lying phonons in GeSb2Te4.PHYSICAL REVIEW B,108(5).
MLA Wu, Peng,et al."Topological surface states and weak thermal phonon anharmonicity of low-lying phonons in GeSb2Te4".PHYSICAL REVIEW B 108.5(2023).
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