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

IF 9.1 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
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
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引用次数: 0

摘要

某些低维材料的拓扑表面态(TSS)具有无间隙带结构、无质量准粒子和非线性光学行为,为低能光子探测的应用提供了明显的优势。在此,我们开发了一种准一维(准1d)过渡金属硫系材料Ta2PdSe6,具有强大的TSS,具有由自旋动量锁定和时间反转对称性保护的无间隙能带结构,以及出色的输运特性,包括超过104 cm2·V-1·s-1的高载流子迁移率。准一维链状结构诱导了明显的各向异性,显著降低了载流子散射,进一步提高了输运效率。得益于这些独特的特性,基于ta2pdse6的太赫兹(THz)探测器表现出出色的性能:响应率超过3.63 A·W-1, 0.28 THz时的噪声等效功率为7.4 pW·Hz-1/2,超快响应速度为1.15 μs,光电流各向异性比为68.3。这些发现突出了强TSS在新兴材料中实现高性能和多功能太赫兹探测的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Quasi-One-Dimensional Ta2PdSe6 with Strong Topological Surface States for High-Performance and Polarization-Sensitive Terahertz Detection

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.
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来源期刊
Nano Letters
Nano Letters 工程技术-材料科学:综合
CiteScore
16.80
自引率
2.80%
发文量
1182
审稿时长
1.4 months
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.
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