Liu Yang, Dong Wang, Zhen Hu, Zhuo Dong, Yan Zhang, Keqin Tang, Pengdong Wang, Junrong Zhang, Cheng Chen, Xingang Hou, Jie Li, Qiang Yu, Junyong Wang, Lin Wang, Kai Zhang
{"title":"具有强拓扑表面态的准一维Ta2PdSe6用于高性能偏振敏感太赫兹探测","authors":"Liu Yang, Dong Wang, Zhen Hu, Zhuo Dong, Yan Zhang, Keqin Tang, Pengdong Wang, Junrong Zhang, Cheng Chen, Xingang Hou, Jie Li, Qiang Yu, Junyong Wang, Lin Wang, Kai Zhang","doi":"10.1021/acs.nanolett.5c00328","DOIUrl":null,"url":null,"abstract":"Topological surface states (TSS) in certain low-dimensional materials impart gapless band structure, massless quasiparticles, and nonlinear optical behavior, enabling distinct advantages for applications in low-energy photon detection. Herein, we develop a quasi-one-dimensional (quasi-1D) transition metal chalcogenide material, Ta<sub>2</sub>PdSe<sub>6</sub>, with robust TSS, which exhibits a gapless band structure protected by spin-momentum locking and time-reversal symmetry, alongside exceptional transport properties, including a high carrier mobility exceeding 10<sup>4</sup> cm<sup>2</sup>·V<sup>–1</sup>·s<sup>–1</sup>. The quasi-1D chain-like structure induces pronounced anisotropy and significantly reduces carrier scattering, further enhancing transport efficiency. Benefiting from these unique characteristics, the Ta<sub>2</sub>PdSe<sub>6</sub>-based terahertz (THz) detectors demonstrate outstanding performance with responsivity exceeding 3.63 A·W<sup>–1</sup>, a noise equivalent power of 7.4 pW·Hz<sup>–1/2</sup> at 0.28 THz, ultrafast response speed of 1.15 μs, and an exceptional photocurrent anisotropic ratio of 68.3. These findings highlight the significant potential of strong TSS in emerging materials to achieve high-performance and multifunctional THz detection.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"6 1","pages":""},"PeriodicalIF":9.1000,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quasi-One-Dimensional Ta2PdSe6 with Strong Topological Surface States for High-Performance and Polarization-Sensitive Terahertz Detection\",\"authors\":\"Liu Yang, Dong Wang, Zhen Hu, Zhuo Dong, Yan Zhang, Keqin Tang, Pengdong Wang, Junrong Zhang, Cheng Chen, Xingang Hou, Jie Li, Qiang Yu, Junyong Wang, Lin Wang, Kai Zhang\",\"doi\":\"10.1021/acs.nanolett.5c00328\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Topological surface states (TSS) in certain low-dimensional materials impart gapless band structure, massless quasiparticles, and nonlinear optical behavior, enabling distinct advantages for applications in low-energy photon detection. Herein, we develop a quasi-one-dimensional (quasi-1D) transition metal chalcogenide material, Ta<sub>2</sub>PdSe<sub>6</sub>, with robust TSS, which exhibits a gapless band structure protected by spin-momentum locking and time-reversal symmetry, alongside exceptional transport properties, including a high carrier mobility exceeding 10<sup>4</sup> cm<sup>2</sup>·V<sup>–1</sup>·s<sup>–1</sup>. The quasi-1D chain-like structure induces pronounced anisotropy and significantly reduces carrier scattering, further enhancing transport efficiency. Benefiting from these unique characteristics, the Ta<sub>2</sub>PdSe<sub>6</sub>-based terahertz (THz) detectors demonstrate outstanding performance with responsivity exceeding 3.63 A·W<sup>–1</sup>, a noise equivalent power of 7.4 pW·Hz<sup>–1/2</sup> at 0.28 THz, ultrafast response speed of 1.15 μs, and an exceptional photocurrent anisotropic ratio of 68.3. These findings highlight the significant potential of strong TSS in emerging materials to achieve high-performance and multifunctional THz detection.\",\"PeriodicalId\":53,\"journal\":{\"name\":\"Nano Letters\",\"volume\":\"6 1\",\"pages\":\"\"},\"PeriodicalIF\":9.1000,\"publicationDate\":\"2025-04-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nano Letters\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.nanolett.5c00328\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.nanolett.5c00328","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Quasi-One-Dimensional Ta2PdSe6 with Strong Topological Surface States for High-Performance and Polarization-Sensitive Terahertz Detection
Topological surface states (TSS) in certain low-dimensional materials impart gapless band structure, massless quasiparticles, and nonlinear optical behavior, enabling distinct advantages for applications in low-energy photon detection. Herein, we develop a quasi-one-dimensional (quasi-1D) transition metal chalcogenide material, Ta2PdSe6, with robust TSS, which exhibits a gapless band structure protected by spin-momentum locking and time-reversal symmetry, alongside exceptional transport properties, including a high carrier mobility exceeding 104 cm2·V–1·s–1. The quasi-1D chain-like structure induces pronounced anisotropy and significantly reduces carrier scattering, further enhancing transport efficiency. Benefiting from these unique characteristics, the Ta2PdSe6-based terahertz (THz) detectors demonstrate outstanding performance with responsivity exceeding 3.63 A·W–1, a noise equivalent power of 7.4 pW·Hz–1/2 at 0.28 THz, ultrafast response speed of 1.15 μs, and an exceptional photocurrent anisotropic ratio of 68.3. These findings highlight the significant potential of strong TSS in emerging materials to achieve high-performance and multifunctional THz detection.
期刊介绍:
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.