High temperature superconducting FeSe films on SrTiO(3) substrates

Interface enhanced superconductivity at two dimensional limit has become one of most intriguing research directions in condensed matter physics. Here, we report the superconducting properties of ultra-thin FeSe films with the thickness of one unit cell (1-UC) grown on conductive and insulating SrTiO...

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Autores principales: Sun, Yi, Zhang, Wenhao, Xing, Ying, Li, Fangsen, Zhao, Yanfei, Xia, Zhengcai, Wang, Lili, Ma, Xucun, Xue, Qi-Kun, Wang, Jian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4129414/
https://www.ncbi.nlm.nih.gov/pubmed/25113391
http://dx.doi.org/10.1038/srep06040
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author Sun, Yi
Zhang, Wenhao
Xing, Ying
Li, Fangsen
Zhao, Yanfei
Xia, Zhengcai
Wang, Lili
Ma, Xucun
Xue, Qi-Kun
Wang, Jian
author_facet Sun, Yi
Zhang, Wenhao
Xing, Ying
Li, Fangsen
Zhao, Yanfei
Xia, Zhengcai
Wang, Lili
Ma, Xucun
Xue, Qi-Kun
Wang, Jian
author_sort Sun, Yi
collection PubMed
description Interface enhanced superconductivity at two dimensional limit has become one of most intriguing research directions in condensed matter physics. Here, we report the superconducting properties of ultra-thin FeSe films with the thickness of one unit cell (1-UC) grown on conductive and insulating SrTiO(3) (STO) substrates. For the 1-UC FeSe on conductive STO substrate (Nb-STO), the magnetization versus temperature (M-T) measurement shows a drop crossover around 85 K. For the FeSe films on insulating STO substrate, systematic transport measurements were carried out and the sheet resistance of FeSe films exhibits Arrhenius TAFF behavior with a crossover from a single-vortex pinning region to a collective creep region. More intriguing, sign reversal of Hall resistance with temperature is observed, demonstrating a crossover from hole conduction to electron conduction above T(C) in 1-UC FeSe films.
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spelling pubmed-41294142014-08-14 High temperature superconducting FeSe films on SrTiO(3) substrates Sun, Yi Zhang, Wenhao Xing, Ying Li, Fangsen Zhao, Yanfei Xia, Zhengcai Wang, Lili Ma, Xucun Xue, Qi-Kun Wang, Jian Sci Rep Article Interface enhanced superconductivity at two dimensional limit has become one of most intriguing research directions in condensed matter physics. Here, we report the superconducting properties of ultra-thin FeSe films with the thickness of one unit cell (1-UC) grown on conductive and insulating SrTiO(3) (STO) substrates. For the 1-UC FeSe on conductive STO substrate (Nb-STO), the magnetization versus temperature (M-T) measurement shows a drop crossover around 85 K. For the FeSe films on insulating STO substrate, systematic transport measurements were carried out and the sheet resistance of FeSe films exhibits Arrhenius TAFF behavior with a crossover from a single-vortex pinning region to a collective creep region. More intriguing, sign reversal of Hall resistance with temperature is observed, demonstrating a crossover from hole conduction to electron conduction above T(C) in 1-UC FeSe films. Nature Publishing Group 2014-08-12 /pmc/articles/PMC4129414/ /pubmed/25113391 http://dx.doi.org/10.1038/srep06040 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/
spellingShingle Article
Sun, Yi
Zhang, Wenhao
Xing, Ying
Li, Fangsen
Zhao, Yanfei
Xia, Zhengcai
Wang, Lili
Ma, Xucun
Xue, Qi-Kun
Wang, Jian
High temperature superconducting FeSe films on SrTiO(3) substrates
title High temperature superconducting FeSe films on SrTiO(3) substrates
title_full High temperature superconducting FeSe films on SrTiO(3) substrates
title_fullStr High temperature superconducting FeSe films on SrTiO(3) substrates
title_full_unstemmed High temperature superconducting FeSe films on SrTiO(3) substrates
title_short High temperature superconducting FeSe films on SrTiO(3) substrates
title_sort high temperature superconducting fese films on srtio(3) substrates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4129414/
https://www.ncbi.nlm.nih.gov/pubmed/25113391
http://dx.doi.org/10.1038/srep06040
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