Semimetallic features in thermoelectric transport properties of 2H–3R phase niobium diselenide

Hongjae Moon; Jeongmin Kim; Joonho Bang; Seokkyoon Hong; Seonhye Youn; Hyunjun Shin; Jong Wook Roh; Wooyoung Shim; Wooyoung Lee

doi:10.1016/j.nanoen.2020.105197

Semimetallic features in thermoelectric transport properties of 2H–3R phase niobium diselenide

Hongjae Moon, Jeongmin Kim, Joonho Bang, Seokkyoon Hong, Seonhye Youn, Hyunjun Shin, Jong Wook Roh, Wooyoung Shim, Wooyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In two-dimensional van der Waals crystals, the interlayer stacking sequence often leads to a change in crystal symmetry and, thus, new polymorphs, leading to an abundant array of physical properties. In this paper, we report the polymorphic form of 2H–3R–NbSe₂ that exhibits a substantial difference in terms of the gate dependence of semimetallic behavior and Seebeck coefficient, compared to the well-known 2H–NbSe₂ with metallic transport behavior. The semimetallic features of 2H–3R–NbSe₂ indicate the presence of minor carriers, confirmed through theoretical calculations, which is in good agreement with the transport behavior. Our results reveal perspectives for understanding the metastable 2H–3R phase NbSe₂, which is not far from equilibrium, and for engineering the materials necessary for efficient energy harvesting.

Original language	English
Article number	105197
Journal	Nano Energy
Volume	78
DOIs	https://doi.org/10.1016/j.nanoen.2020.105197
Publication status	Published - 2020 Dec

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China ( 41672243 ) and t he Fundamental Research Funds for the Central Universities . We gratefully acknowledge comments and suggestions from anonymous reviewers.

Publisher Copyright:
© 2020 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

UN SDGs

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10.1016/j.nanoen.2020.105197

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title = "Semimetallic features in thermoelectric transport properties of 2H–3R phase niobium diselenide",

abstract = "In two-dimensional van der Waals crystals, the interlayer stacking sequence often leads to a change in crystal symmetry and, thus, new polymorphs, leading to an abundant array of physical properties. In this paper, we report the polymorphic form of 2H–3R–NbSe2 that exhibits a substantial difference in terms of the gate dependence of semimetallic behavior and Seebeck coefficient, compared to the well-known 2H–NbSe2 with metallic transport behavior. The semimetallic features of 2H–3R–NbSe2 indicate the presence of minor carriers, confirmed through theoretical calculations, which is in good agreement with the transport behavior. Our results reveal perspectives for understanding the metastable 2H–3R phase NbSe2, which is not far from equilibrium, and for engineering the materials necessary for efficient energy harvesting.",

author = "Hongjae Moon and Jeongmin Kim and Joonho Bang and Seokkyoon Hong and Seonhye Youn and Hyunjun Shin and Roh, {Jong Wook} and Wooyoung Shim and Wooyoung Lee",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China ( 41672243 ) and t he Fundamental Research Funds for the Central Universities . We gratefully acknowledge comments and suggestions from anonymous reviewers. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = dec,

doi = "10.1016/j.nanoen.2020.105197",

language = "English",

volume = "78",

journal = "Nano Energy",

issn = "2211-2855",

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T1 - Semimetallic features in thermoelectric transport properties of 2H–3R phase niobium diselenide

AU - Moon, Hongjae

AU - Kim, Jeongmin

AU - Bang, Joonho

AU - Hong, Seokkyoon

AU - Youn, Seonhye

AU - Shin, Hyunjun

AU - Roh, Jong Wook

AU - Shim, Wooyoung

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China ( 41672243 ) and t he Fundamental Research Funds for the Central Universities . We gratefully acknowledge comments and suggestions from anonymous reviewers. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/12

Y1 - 2020/12

N2 - In two-dimensional van der Waals crystals, the interlayer stacking sequence often leads to a change in crystal symmetry and, thus, new polymorphs, leading to an abundant array of physical properties. In this paper, we report the polymorphic form of 2H–3R–NbSe2 that exhibits a substantial difference in terms of the gate dependence of semimetallic behavior and Seebeck coefficient, compared to the well-known 2H–NbSe2 with metallic transport behavior. The semimetallic features of 2H–3R–NbSe2 indicate the presence of minor carriers, confirmed through theoretical calculations, which is in good agreement with the transport behavior. Our results reveal perspectives for understanding the metastable 2H–3R phase NbSe2, which is not far from equilibrium, and for engineering the materials necessary for efficient energy harvesting.

AB - In two-dimensional van der Waals crystals, the interlayer stacking sequence often leads to a change in crystal symmetry and, thus, new polymorphs, leading to an abundant array of physical properties. In this paper, we report the polymorphic form of 2H–3R–NbSe2 that exhibits a substantial difference in terms of the gate dependence of semimetallic behavior and Seebeck coefficient, compared to the well-known 2H–NbSe2 with metallic transport behavior. The semimetallic features of 2H–3R–NbSe2 indicate the presence of minor carriers, confirmed through theoretical calculations, which is in good agreement with the transport behavior. Our results reveal perspectives for understanding the metastable 2H–3R phase NbSe2, which is not far from equilibrium, and for engineering the materials necessary for efficient energy harvesting.

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SN - 2211-2855

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JO - Nano Energy

JF - Nano Energy

M1 - 105197

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Semimetallic features in thermoelectric transport properties of 2H–3R phase niobium diselenide

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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