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High anisotropy in electrical and thermal conductivity through the design of aerogel-like superlattice (NaOH)<sub>0.5</sub>NbSe<sub>2</sub>

Physics

High anisotropy in electrical and thermal conductivity through the design of aerogel-like superlattice (NaOH)<sub>0.5</sub>NbSe<sub>2</sub>

R. Sun, J. Deng, et al.

Discover how Ruijin Sun and colleagues have achieved interlayer decoupling in bulk materials, showcasing unique electric and vibrational properties. This groundbreaking research reveals a superlattice of NbSe2 and porous hydroxide layers that enhances 2D superconductivity and CDW transition temperature, paving the way for large-scale production of advanced materials.

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Playback language: English
Abstract
Interlayer decoupling is crucial for achieving unique properties in atomically thin materials, but its application in bulk materials is limited. This study constructs a superlattice of alternating NbSe<sub>2</sub> and highly porous hydroxide layers [(NaOH)<sub>0.5</sub>NbSe<sub>2</sub>] to demonstrate interlayer decoupling in bulk. Electric decoupling is shown by a 1D insulating state interlayer, while vibrational decoupling is evidenced by the absence of interlayer modes in Raman spectra, dominant local modes in heat capacity, low interlayer coupling energy, and reduced out-of-plane thermal conductivity. This leads to enhanced CDW transition temperature and Pauli-breaking 2D superconductivity, mimicking monolayer NbSe<sub>2</sub> behavior. The findings provide a pathway for large-scale production of materials with intrinsic 2D properties.
Publisher
Nature Communications
Published On
Oct 21, 2023
Authors
Ruijin Sun, Jun Deng, Xiaowei Wu, Munan Hao, Ke Ma, Yuxin Ma, Changchun Zhao, Dezhong Meng, Xiaoyu Ji, Yiyang Ding, Yu Pang, Xin Qian, Ronggui Yang, Guodong Li, Zhilin Li, Linjie Dai, Tianping Ying, Huaizhou Zhao, Shixuan Du, Gang Li, Shifeng Jin, Xiaolong Chen
Tags
interlayer decoupling
NbSe2
superlattice
2D superconductivity
CDW transition
thermal conductivity
Raman spectra
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