Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field

Abstract Electronic and optical responses of zigzag- and armchair-edge quasi-one-dimensional phosphorene nanoribbons (Q1D-PNRs) to strain and external field are comparatively studied based on the tight-binding calculations. The results show that: (i) Zigzag-edge Q1D-PNR has the metallic ground state...

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Autores principales:	Longlong Zhang, Yuying Hao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/60309a39040049a9a4d6f9c7f251e226
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spelling	oai:doaj.org-article:60309a39040049a9a4d6f9c7f251e2262021-12-02T15:08:19ZElectronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field10.1038/s41598-018-24521-w2045-2322https://doaj.org/article/60309a39040049a9a4d6f9c7f251e2262018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-24521-whttps://doaj.org/toc/2045-2322Abstract Electronic and optical responses of zigzag- and armchair-edge quasi-one-dimensional phosphorene nanoribbons (Q1D-PNRs) to strain and external field are comparatively studied based on the tight-binding calculations. The results show that: (i) Zigzag-edge Q1D-PNR has the metallic ground state; applying global strains can not open the gap at the Fermi level but applying the electric field can achieve it; the direct/indirect character of the field-induced gap is determined by the electron-hole symmetry; an electric-field-enhanced optical absorption of low-energy photons is also predicted. (ii) Armchair-edge Q1D-PNR turns out an insulator with the large direct band gap; the inter-plane strain modulates this gap non monotonically while the in-plane one modulates it monotonically; in addition, the gap responses to electric fields also show strong direction dependence, i. e., increasing the inter-plane electric field will monotonically enlarge the gap but the electric field along the width direction modulates the gap non monotonically with three characteristic response regions.Longlong ZhangYuying HaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-13 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Longlong Zhang Yuying Hao Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
description	Abstract Electronic and optical responses of zigzag- and armchair-edge quasi-one-dimensional phosphorene nanoribbons (Q1D-PNRs) to strain and external field are comparatively studied based on the tight-binding calculations. The results show that: (i) Zigzag-edge Q1D-PNR has the metallic ground state; applying global strains can not open the gap at the Fermi level but applying the electric field can achieve it; the direct/indirect character of the field-induced gap is determined by the electron-hole symmetry; an electric-field-enhanced optical absorption of low-energy photons is also predicted. (ii) Armchair-edge Q1D-PNR turns out an insulator with the large direct band gap; the inter-plane strain modulates this gap non monotonically while the in-plane one modulates it monotonically; in addition, the gap responses to electric fields also show strong direction dependence, i. e., increasing the inter-plane electric field will monotonically enlarge the gap but the electric field along the width direction modulates the gap non monotonically with three characteristic response regions.
format	article
author	Longlong Zhang Yuying Hao
author_facet	Longlong Zhang Yuying Hao
author_sort	Longlong Zhang
title	Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
title_short	Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
title_full	Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
title_fullStr	Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
title_full_unstemmed	Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
title_sort	electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/60309a39040049a9a4d6f9c7f251e226
work_keys_str_mv	AT longlongzhang electronicandopticalresponsesofquasionedimensionalphosphorenenanoribbonstostrainandelectricfield AT yuyinghao electronicandopticalresponsesofquasionedimensionalphosphorenenanoribbonstostrainandelectricfield
_version_	1718388187204681728

Electronic and optical responses of quasi-one-dimensional phosphorene nanoribbons to strain and electric field

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