Alkali-created rich properties in grapheme nanoribbons: Chemical bondings

Abstract The alkali-adsorbed graphene nanoribbons exhibit the feature-rich electronic and magnetic properties. From the first-principles calculations, there are only few adatom-dominated conduction bands, and the other conduction and valence bands are caused by carbon atoms. A lot of free electrons...

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Autores principales:	Yu-Tsung Lin, Shih-Yang Lin, Yu-Huang Chiu, Ming-Fa Lin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7640cbce699448d3bfa5a54491390567
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spelling	oai:doaj.org-article:7640cbce699448d3bfa5a544913905672021-12-02T11:40:31ZAlkali-created rich properties in grapheme nanoribbons: Chemical bondings10.1038/s41598-017-01688-22045-2322https://doaj.org/article/7640cbce699448d3bfa5a544913905672017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01688-2https://doaj.org/toc/2045-2322Abstract The alkali-adsorbed graphene nanoribbons exhibit the feature-rich electronic and magnetic properties. From the first-principles calculations, there are only few adatom-dominated conduction bands, and the other conduction and valence bands are caused by carbon atoms. A lot of free electrons are revealed in the occupied alkali- and carbon-dependent conduction bands. Energy bands are sensitive to the concentration, distribution and kind of adatom and the edge structure, while the total linear free carrier density only relies on the first one. These mainly arise from a single s − 2p z orbital hybridization in the adatom-carbon bond. Specifically, zigzag systems can present the anti-ferromagnetic ordering across two edges, ferromagnetic ordering along one edge and non-magnetism, being reflected in the edge-localized energy bands with or without spin splitting. The diverse energy dispersions contribute many special peaks in density of states. The critical chemical bonding and the distinct spin configuration could be verified from the experimental measurements.Yu-Tsung LinShih-Yang LinYu-Huang ChiuMing-Fa LinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu-Tsung Lin Shih-Yang Lin Yu-Huang Chiu Ming-Fa Lin Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
description	Abstract The alkali-adsorbed graphene nanoribbons exhibit the feature-rich electronic and magnetic properties. From the first-principles calculations, there are only few adatom-dominated conduction bands, and the other conduction and valence bands are caused by carbon atoms. A lot of free electrons are revealed in the occupied alkali- and carbon-dependent conduction bands. Energy bands are sensitive to the concentration, distribution and kind of adatom and the edge structure, while the total linear free carrier density only relies on the first one. These mainly arise from a single s − 2p z orbital hybridization in the adatom-carbon bond. Specifically, zigzag systems can present the anti-ferromagnetic ordering across two edges, ferromagnetic ordering along one edge and non-magnetism, being reflected in the edge-localized energy bands with or without spin splitting. The diverse energy dispersions contribute many special peaks in density of states. The critical chemical bonding and the distinct spin configuration could be verified from the experimental measurements.
format	article
author	Yu-Tsung Lin Shih-Yang Lin Yu-Huang Chiu Ming-Fa Lin
author_facet	Yu-Tsung Lin Shih-Yang Lin Yu-Huang Chiu Ming-Fa Lin
author_sort	Yu-Tsung Lin
title	Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
title_short	Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
title_full	Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
title_fullStr	Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
title_full_unstemmed	Alkali-created rich properties in grapheme nanoribbons: Chemical bondings
title_sort	alkali-created rich properties in grapheme nanoribbons: chemical bondings
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7640cbce699448d3bfa5a54491390567
work_keys_str_mv	AT yutsunglin alkalicreatedrichpropertiesingraphemenanoribbonschemicalbondings AT shihyanglin alkalicreatedrichpropertiesingraphemenanoribbonschemicalbondings AT yuhuangchiu alkalicreatedrichpropertiesingraphemenanoribbonschemicalbondings AT mingfalin alkalicreatedrichpropertiesingraphemenanoribbonschemicalbondings
_version_	1718395589067014144

Alkali-created rich properties in grapheme nanoribbons: Chemical bondings

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