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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]) |
ISSN | 2469-9950 |
EISSN | 2469-9969 |
卷号 | 108期号:5 |
发表状态 | 已发表 |
DOI | 10.1103/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) |
引用统计 | 正在获取...
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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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