Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron

Understanding the interplay between charge and spin and its effects on transport is a ubiquitous challenge in quantum many-body systems. In the Fermi-Hubbard model, this interplay is thought to give rise to magnetic polarons, whose dynamics may explain emergent properties of quantum materials such a...

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Autores principales:	Geoffrey Ji, Muqing Xu, Lev Haldar Kendrick, Christie S. Chiu, Justus C. Brüggenjürgen, Daniel Greif, Annabelle Bohrdt, Fabian Grusdt, Eugene Demler, Martin Lebrat, Markus Greiner
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/896587dde8764c55929cbddc9c017ced
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spelling	oai:doaj.org-article:896587dde8764c55929cbddc9c017ced2021-12-02T16:44:53ZCoupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron10.1103/PhysRevX.11.0210222160-3308https://doaj.org/article/896587dde8764c55929cbddc9c017ced2021-04-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.021022http://doi.org/10.1103/PhysRevX.11.021022https://doaj.org/toc/2160-3308Understanding the interplay between charge and spin and its effects on transport is a ubiquitous challenge in quantum many-body systems. In the Fermi-Hubbard model, this interplay is thought to give rise to magnetic polarons, whose dynamics may explain emergent properties of quantum materials such as high-temperature superconductivity. In this work, we use a cold-atom quantum simulator to directly observe the formation dynamics and subsequent spreading of individual magnetic polarons. Measuring the density- and spin-resolved evolution of a single hole in a 2D Hubbard insulator with short-range antiferromagnetic correlations reveals fast initial delocalization and a dressing of the spin background, indicating polaron formation. At long times, we find that dynamics are slowed down by the spin exchange time, and they are compatible with a polaronic model with strong density and spin coupling. Our work enables the study of out-of-equilibrium emergent phenomena in the Fermi-Hubbard model, one dopant at a time.Geoffrey JiMuqing XuLev Haldar KendrickChristie S. ChiuJustus C. BrüggenjürgenDaniel GreifAnnabelle BohrdtFabian GrusdtEugene DemlerMartin LebratMarkus GreinerAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 2, p 021022 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Geoffrey Ji Muqing Xu Lev Haldar Kendrick Christie S. Chiu Justus C. Brüggenjürgen Daniel Greif Annabelle Bohrdt Fabian Grusdt Eugene Demler Martin Lebrat Markus Greiner Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
description	Understanding the interplay between charge and spin and its effects on transport is a ubiquitous challenge in quantum many-body systems. In the Fermi-Hubbard model, this interplay is thought to give rise to magnetic polarons, whose dynamics may explain emergent properties of quantum materials such as high-temperature superconductivity. In this work, we use a cold-atom quantum simulator to directly observe the formation dynamics and subsequent spreading of individual magnetic polarons. Measuring the density- and spin-resolved evolution of a single hole in a 2D Hubbard insulator with short-range antiferromagnetic correlations reveals fast initial delocalization and a dressing of the spin background, indicating polaron formation. At long times, we find that dynamics are slowed down by the spin exchange time, and they are compatible with a polaronic model with strong density and spin coupling. Our work enables the study of out-of-equilibrium emergent phenomena in the Fermi-Hubbard model, one dopant at a time.
format	article
author	Geoffrey Ji Muqing Xu Lev Haldar Kendrick Christie S. Chiu Justus C. Brüggenjürgen Daniel Greif Annabelle Bohrdt Fabian Grusdt Eugene Demler Martin Lebrat Markus Greiner
author_facet	Geoffrey Ji Muqing Xu Lev Haldar Kendrick Christie S. Chiu Justus C. Brüggenjürgen Daniel Greif Annabelle Bohrdt Fabian Grusdt Eugene Demler Martin Lebrat Markus Greiner
author_sort	Geoffrey Ji
title	Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
title_short	Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
title_full	Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
title_fullStr	Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
title_full_unstemmed	Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron
title_sort	coupling a mobile hole to an antiferromagnetic spin background: transient dynamics of a magnetic polaron
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/896587dde8764c55929cbddc9c017ced
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Coupling a Mobile Hole to an Antiferromagnetic Spin Background: Transient Dynamics of a Magnetic Polaron

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