High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3

Abstract Spin degree of freedom generally plays an important role in unconventional superconductivity. In many of the iron-based compounds, superconductivity is found in close proximity to long-range antiferromagnetic order, whereas monolayer FeSe grown on SrTiO3, with enhanced superconductivity, ex...

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Autores principales:	Chong Liu, Hyungki Shin, Andrin Doll, Hsiang-Hsi Kung, Ryan P. Day, Bruce A. Davidson, Jan Dreiser, Giorgio Levy, Andrea Damascelli, Cinthia Piamonteze, Ke Zou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/d90d48d8bb824781abcd624997ef185c
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spelling	oai:doaj.org-article:d90d48d8bb824781abcd624997ef185c2021-12-02T19:16:25ZHigh-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO310.1038/s41535-021-00388-52397-4648https://doaj.org/article/d90d48d8bb824781abcd624997ef185c2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00388-5https://doaj.org/toc/2397-4648Abstract Spin degree of freedom generally plays an important role in unconventional superconductivity. In many of the iron-based compounds, superconductivity is found in close proximity to long-range antiferromagnetic order, whereas monolayer FeSe grown on SrTiO3, with enhanced superconductivity, exhibits no magnetic or nematic ordering. Here we grow monolayer and multilayer FeSe on antiferromagnetic EuTiO3(001) layers, in an effort to introduce a spin polarization in proximity to the superconductivity of FeSe. By X-ray magnetic dichroism, we observe an antiferromagnet–ferromagnet switching on Eu and Ti sites in EuTiO3 driven by the applied magnetic field, with no concomitant spin polarization on the Fe site of FeSe. Transport measurements show enhanced superconductivity of monolayer FeSe on EuTiO3 with a transition temperature of ~30 K. The band structure revealed by photoemission spectroscopy is analogous to that of FeSe/SrTiO3. Our work creates a platform for the interplay of spin and unconventional superconductivity in the two-dimensional limit.Chong LiuHyungki ShinAndrin DollHsiang-Hsi KungRyan P. DayBruce A. DavidsonJan DreiserGiorgio LevyAndrea DamascelliCinthia PiamontezeKe ZouNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Chong Liu Hyungki Shin Andrin Doll Hsiang-Hsi Kung Ryan P. Day Bruce A. Davidson Jan Dreiser Giorgio Levy Andrea Damascelli Cinthia Piamonteze Ke Zou High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
description	Abstract Spin degree of freedom generally plays an important role in unconventional superconductivity. In many of the iron-based compounds, superconductivity is found in close proximity to long-range antiferromagnetic order, whereas monolayer FeSe grown on SrTiO3, with enhanced superconductivity, exhibits no magnetic or nematic ordering. Here we grow monolayer and multilayer FeSe on antiferromagnetic EuTiO3(001) layers, in an effort to introduce a spin polarization in proximity to the superconductivity of FeSe. By X-ray magnetic dichroism, we observe an antiferromagnet–ferromagnet switching on Eu and Ti sites in EuTiO3 driven by the applied magnetic field, with no concomitant spin polarization on the Fe site of FeSe. Transport measurements show enhanced superconductivity of monolayer FeSe on EuTiO3 with a transition temperature of ~30 K. The band structure revealed by photoemission spectroscopy is analogous to that of FeSe/SrTiO3. Our work creates a platform for the interplay of spin and unconventional superconductivity in the two-dimensional limit.
format	article
author	Chong Liu Hyungki Shin Andrin Doll Hsiang-Hsi Kung Ryan P. Day Bruce A. Davidson Jan Dreiser Giorgio Levy Andrea Damascelli Cinthia Piamonteze Ke Zou
author_facet	Chong Liu Hyungki Shin Andrin Doll Hsiang-Hsi Kung Ryan P. Day Bruce A. Davidson Jan Dreiser Giorgio Levy Andrea Damascelli Cinthia Piamonteze Ke Zou
author_sort	Chong Liu
title	High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
title_short	High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
title_full	High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
title_fullStr	High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
title_full_unstemmed	High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3
title_sort	high-temperature superconductivity and its robustness against magnetic polarization in monolayer fese on eutio3
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d90d48d8bb824781abcd624997ef185c
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High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3

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