Electrical transport phenomena in two-dimensional metallic 2H-NbSe2: an experimental and theoretical study

IF 5.8 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Nanoscale Pub Date : 2024-11-12 DOI:10.1039/d4nr03369h
Jeongmin Kim, Seonhye Youn, Damin Lee, Chan Woong Kim, Hongjae Moon, Seok-Hwan Chung, Hoyoung Kim, Dong Hwan Kim, Sumin Kim, Jong Wook Roh, Joonho Bang, Wooyoung Lee
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引用次数: 0

Abstract

Two-dimensional (2D) metallic transition metal dichalcogenides (TMDCs) have attracted extensive interest in various fields owing to their unique electronic properties. However, studies on their transport properties and the modulation of these properties based on their band structure are limited. Herein, we studied the transport phenomena in 2D metallic 2H-NbSe2 using experimental and theoretical approaches. The transport properties, including electrical conductivity (σ) and Seebeck coefficient (S), of mechanically exfoliated 2H-NbSe2 nanosheets were measured. We observed field effect-dependent variations in σ and S of the 2H-NbSe2 nanosheets. Theoretical calculations of the electronic band structures and estimations of the transport properties of 2D 2H-NbSe2 crystals were conducted to verify and explain the experimental results. The superconducting transition temperature of the exfoliated NbSe2 nanosheets validated the reliability of the sample preparation procedures and indicated the high quality of the samples. Our findings provide a basis for understanding the electrical properties of metallic TMDCs intended for various applications.

Abstract Image

二维金属 2H-NbSe2 中的电输运现象:实验与理论研究
二维(2D)金属过渡金属二卤化物(TMDCs)因其独特的电子特性在各个领域引起了广泛的兴趣。然而,对它们的输运特性以及基于其带状结构对这些特性的调制的研究还很有限。在此,我们利用实验和理论方法研究了二维金属 2H-NbSe2 中的输运现象。我们测量了机械剥离的 2H-NbSe2 纳米片的输运特性,包括电导率(σ)和塞贝克系数(S)。我们观察到 2H-NbSe2 纳米片的σ 和 S 随场效应而变化。为了验证和解释实验结果,我们对二维 2H-NbSe2 晶体的电子能带结构和传输特性进行了理论计算。剥离的 NbSe2 纳米片的超导转变温度验证了样品制备程序的可靠性,并表明了样品的高质量。我们的研究结果为理解用于各种应用的金属 TMDC 的电气特性提供了基础。
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来源期刊
Nanoscale
Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
12.10
自引率
3.00%
发文量
1628
审稿时长
1.6 months
期刊介绍: Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.
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