Discovery of an insulating parent phase in single-layer FeSe/SrTiO3 films
The nature of the parent compound is intimately connected to the doping-induced emergence of superconductivity and the pairing mechanism in high-temperature superconductors. In high-temperature cuprate superconductors, the parent phase is believed to be a Mott insulator and superconductivity is real...
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| Veröffentlicht in: | Physical review. B 2020-09, Vol.102 (11), p.1 |
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| creator | Hu, Yong Xu, Yu Zhang, Yi-Min Wang, Qingyan He, Shaolong Liu, Defa Liang, Aiji Huang, Jianwei Li, Cong Cai, Yongqing Wu, Dingsong Liu, Guodong Li, Fang-Sen Fan, Jia-Qi Zhou, Guan-Yu Wang, Lili Song, Can-Li Ma, Xu-Cun Xue, Qi-Kun Xu, Zuyan Zhao, Lin Zhou, X J |
| description | The nature of the parent compound is intimately connected to the doping-induced emergence of superconductivity and the pairing mechanism in high-temperature superconductors. In high-temperature cuprate superconductors, the parent phase is believed to be a Mott insulator and superconductivity is realized by doping the Mott insulator. In iron-based superconductors, on the other hand, the parent compounds discovered so far are all bad metals which are either antiferromagnetic or nematic. Here we report direct spectroscopic evidence that the parent phase of the single-layer FeSe/SrTiO3(FeSe/STO) films is insulating. It represents a case in the iron-based superconductors in which the parent compound is an insulator. We also find that the single-layer FeSe/STO films exhibit a distinct doping evolution to superconductivity that is similar to doping a Mott insulator in cuprate superconductors. These observations provide key insights in understanding the record high-TC superconductivity in single-layer FeSe/STO films. |
| doi_str_mv | 10.1103/PhysRevB.102.115144 |
| format | Article |
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In high-temperature cuprate superconductors, the parent phase is believed to be a Mott insulator and superconductivity is realized by doping the Mott insulator. In iron-based superconductors, on the other hand, the parent compounds discovered so far are all bad metals which are either antiferromagnetic or nematic. Here we report direct spectroscopic evidence that the parent phase of the single-layer FeSe/SrTiO3(FeSe/STO) films is insulating. It represents a case in the iron-based superconductors in which the parent compound is an insulator. We also find that the single-layer FeSe/STO films exhibit a distinct doping evolution to superconductivity that is similar to doping a Mott insulator in cuprate superconductors. 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These observations provide key insights in understanding the record high-TC superconductivity in single-layer FeSe/STO films.</description><subject>Antiferromagnetism</subject><subject>Doping</subject><subject>Electrons</subject><subject>High temperature superconductors</subject><subject>Iron</subject><subject>Strontium titanates</subject><subject>Superconductivity</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9jU1Lw0AURQdRsNT-AjcDrtPOy3z1LbXaWihUbF2XyfTFpsQkZpJC_r0Diqt7ORfOZewexBRAyNnbaQjvdHmagkgj0aDUFRulymCCaPD6v2txyyYhnIUQYARagSO2fi6Cry_UDrzOuat4UYW-dF1RffLGtVR1vDm5QJHzEGFJSekGavmSdjTbtftiK3lelF_hjt3krgw0-csx-1i-7BevyWa7Wi8eN0kDILsEbaa9mZPXRzAIRCYDOKZWkDVWR-JS8Gg1enRqHgellPRZbukoZY5KjtnDr7dp6--eQnc4131bxctDqjTo6DBK_gBjiVAD</recordid><startdate>20200922</startdate><enddate>20200922</enddate><creator>Hu, Yong</creator><creator>Xu, Yu</creator><creator>Zhang, Yi-Min</creator><creator>Wang, Qingyan</creator><creator>He, Shaolong</creator><creator>Liu, Defa</creator><creator>Liang, Aiji</creator><creator>Huang, Jianwei</creator><creator>Li, Cong</creator><creator>Cai, Yongqing</creator><creator>Wu, Dingsong</creator><creator>Liu, Guodong</creator><creator>Li, Fang-Sen</creator><creator>Fan, Jia-Qi</creator><creator>Zhou, Guan-Yu</creator><creator>Wang, Lili</creator><creator>Song, Can-Li</creator><creator>Ma, Xu-Cun</creator><creator>Xue, Qi-Kun</creator><creator>Xu, Zuyan</creator><creator>Zhao, Lin</creator><creator>Zhou, X J</creator><general>American Physical Society</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20200922</creationdate><title>Discovery of an insulating parent phase in single-layer FeSe/SrTiO3 films</title><author>Hu, Yong ; Xu, Yu ; Zhang, Yi-Min ; Wang, Qingyan ; He, Shaolong ; Liu, Defa ; Liang, Aiji ; Huang, Jianwei ; Li, Cong ; Cai, Yongqing ; Wu, Dingsong ; Liu, Guodong ; Li, Fang-Sen ; Fan, Jia-Qi ; Zhou, Guan-Yu ; Wang, Lili ; Song, Can-Li ; Ma, Xu-Cun ; Xue, Qi-Kun ; Xu, Zuyan ; Zhao, Lin ; Zhou, X J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p113t-97b5c68ec5d1691ee6b11d270e7675691a21c9759c9a48d274443cbf7ed33f943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Antiferromagnetism</topic><topic>Doping</topic><topic>Electrons</topic><topic>High temperature superconductors</topic><topic>Iron</topic><topic>Strontium titanates</topic><topic>Superconductivity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hu, Yong</creatorcontrib><creatorcontrib>Xu, Yu</creatorcontrib><creatorcontrib>Zhang, Yi-Min</creatorcontrib><creatorcontrib>Wang, Qingyan</creatorcontrib><creatorcontrib>He, Shaolong</creatorcontrib><creatorcontrib>Liu, Defa</creatorcontrib><creatorcontrib>Liang, Aiji</creatorcontrib><creatorcontrib>Huang, Jianwei</creatorcontrib><creatorcontrib>Li, Cong</creatorcontrib><creatorcontrib>Cai, Yongqing</creatorcontrib><creatorcontrib>Wu, Dingsong</creatorcontrib><creatorcontrib>Liu, Guodong</creatorcontrib><creatorcontrib>Li, Fang-Sen</creatorcontrib><creatorcontrib>Fan, Jia-Qi</creatorcontrib><creatorcontrib>Zhou, Guan-Yu</creatorcontrib><creatorcontrib>Wang, Lili</creatorcontrib><creatorcontrib>Song, Can-Li</creatorcontrib><creatorcontrib>Ma, Xu-Cun</creatorcontrib><creatorcontrib>Xue, Qi-Kun</creatorcontrib><creatorcontrib>Xu, Zuyan</creatorcontrib><creatorcontrib>Zhao, Lin</creatorcontrib><creatorcontrib>Zhou, X J</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review. 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We also find that the single-layer FeSe/STO films exhibit a distinct doping evolution to superconductivity that is similar to doping a Mott insulator in cuprate superconductors. These observations provide key insights in understanding the record high-TC superconductivity in single-layer FeSe/STO films.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.102.115144</doi></addata></record> |
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| subjects | Antiferromagnetism Doping Electrons High temperature superconductors Iron Strontium titanates Superconductivity |
| title | Discovery of an insulating parent phase in single-layer FeSe/SrTiO3 films |
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