Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons

Abstract We reveal an edge spin triplet p-wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path qua...

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Autores principales:	Tianxing Ma, Fan Yang, Zhongbing Huang, Hai-Qing Lin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bcaa283d83c645a6b1dff18788b11b8d
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spelling	oai:doaj.org-article:bcaa283d83c645a6b1dff18788b11b8d2021-12-02T11:52:33ZTriplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons10.1038/s41598-017-00060-82045-2322https://doaj.org/article/bcaa283d83c645a6b1dff18788b11b8d2017-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00060-8https://doaj.org/toc/2045-2322Abstract We reveal an edge spin triplet p-wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path quantum Monte Carlo method, it is shown that such a spin-triplet pairing is mediated by the ferromagnetic fluctuations caused by the flat band at the edge. The spin susceptibility and effective pairing interactions at the edge strongly increase as the on-site Coulomb interaction increases, indicating the importance of electron-electron correlations. It is also found that the doping-dependent ground-state p-wave pairing correlation bears some similarity to the famous superconducting dome in the phase diagram of a high-temperature superconductor, while the spin correlation at the edge is weakened as the system is doped away from half filling.Tianxing MaFan YangZhongbing HuangHai-Qing LinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tianxing Ma Fan Yang Zhongbing Huang Hai-Qing Lin Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
description	Abstract We reveal an edge spin triplet p-wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path quantum Monte Carlo method, it is shown that such a spin-triplet pairing is mediated by the ferromagnetic fluctuations caused by the flat band at the edge. The spin susceptibility and effective pairing interactions at the edge strongly increase as the on-site Coulomb interaction increases, indicating the importance of electron-electron correlations. It is also found that the doping-dependent ground-state p-wave pairing correlation bears some similarity to the famous superconducting dome in the phase diagram of a high-temperature superconductor, while the spin correlation at the edge is weakened as the system is doped away from half filling.
format	article
author	Tianxing Ma Fan Yang Zhongbing Huang Hai-Qing Lin
author_facet	Tianxing Ma Fan Yang Zhongbing Huang Hai-Qing Lin
author_sort	Tianxing Ma
title	Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
title_short	Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
title_full	Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
title_fullStr	Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
title_full_unstemmed	Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
title_sort	triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/bcaa283d83c645a6b1dff18788b11b8d
work_keys_str_mv	AT tianxingma tripletpwavepairingcorrelationinlowdopedzigzaggraphenenanoribbons AT fanyang tripletpwavepairingcorrelationinlowdopedzigzaggraphenenanoribbons AT zhongbinghuang tripletpwavepairingcorrelationinlowdopedzigzaggraphenenanoribbons AT haiqinglin tripletpwavepairingcorrelationinlowdopedzigzaggraphenenanoribbons
_version_	1718395008018546688

Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons

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