Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study

Engineering quantum phases using light is a novel route to designing functional materials, where light-induced superconductivity is a successful example. Although this phenomenon has been realized experimentally, especially for the high-T_{c} cuprates, the underlying mechanism remains mysterious. Us...

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Autores principales:	Yao Wang, Tao Shi, Cheng-Chien Chen
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/5522a7e3eb224856ba77ffad1d4b612c
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spelling	oai:doaj.org-article:5522a7e3eb224856ba77ffad1d4b612c2021-11-09T16:04:39ZFluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study10.1103/PhysRevX.11.0410282160-3308https://doaj.org/article/5522a7e3eb224856ba77ffad1d4b612c2021-11-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.041028http://doi.org/10.1103/PhysRevX.11.041028https://doaj.org/toc/2160-3308Engineering quantum phases using light is a novel route to designing functional materials, where light-induced superconductivity is a successful example. Although this phenomenon has been realized experimentally, especially for the high-T_{c} cuprates, the underlying mechanism remains mysterious. Using the recently developed variational non-Gaussian exact diagonalization method, we investigate a particular type of photoenhanced superconductivity by suppressing a competing charge order in a strongly correlated electron-electron and electron-phonon system. We find that the d-wave superconductivity pairing correlation can be enhanced by a pulsed laser, consistent with recent experiments based on gap characterizations. However, we also find that the pairing correlation length is heavily suppressed by the pump pulse, indicating that light-enhanced superconductivity may be of fluctuating nature. Our findings also imply a general behavior of nonequilibrium states with competing orders, beyond the description of a mean-field framework.Yao WangTao ShiCheng-Chien ChenAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 4, p 041028 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Yao Wang Tao Shi Cheng-Chien Chen Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
description	Engineering quantum phases using light is a novel route to designing functional materials, where light-induced superconductivity is a successful example. Although this phenomenon has been realized experimentally, especially for the high-T_{c} cuprates, the underlying mechanism remains mysterious. Using the recently developed variational non-Gaussian exact diagonalization method, we investigate a particular type of photoenhanced superconductivity by suppressing a competing charge order in a strongly correlated electron-electron and electron-phonon system. We find that the d-wave superconductivity pairing correlation can be enhanced by a pulsed laser, consistent with recent experiments based on gap characterizations. However, we also find that the pairing correlation length is heavily suppressed by the pump pulse, indicating that light-enhanced superconductivity may be of fluctuating nature. Our findings also imply a general behavior of nonequilibrium states with competing orders, beyond the description of a mean-field framework.
format	article
author	Yao Wang Tao Shi Cheng-Chien Chen
author_facet	Yao Wang Tao Shi Cheng-Chien Chen
author_sort	Yao Wang
title	Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
title_short	Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
title_full	Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
title_fullStr	Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
title_full_unstemmed	Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
title_sort	fluctuating nature of light-enhanced d-wave superconductivity: a time-dependent variational non-gaussian exact diagonalization study
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/5522a7e3eb224856ba77ffad1d4b612c
work_keys_str_mv	AT yaowang fluctuatingnatureoflightenhanceddwavesuperconductivityatimedependentvariationalnongaussianexactdiagonalizationstudy AT taoshi fluctuatingnatureoflightenhanceddwavesuperconductivityatimedependentvariationalnongaussianexactdiagonalizationstudy AT chengchienchen fluctuatingnatureoflightenhanceddwavesuperconductivityatimedependentvariationalnongaussianexactdiagonalizationstudy
_version_	1718440927727452160

Fluctuating Nature of Light-Enhanced d-Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study

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