Interface enhanced superconductivity in FeSe/SrTiO$_{3}$ and the hidden nature

Sha Han; Can-Li Song; Xu-Cun Ma; Qi-Kun Xue

doi:10.5802/crphys.87

Interface enhanced superconductivity in FeSe/SrTiO

_{3}

and the hidden nature

Sha Han ^1,² ; Can-Li Song ^3,² ; Xu-Cun Ma ^3,² ; Qi-Kun Xue ^4,^3,^5,²

¹ CAS Key Laboratory of Nanophotonic Materials and Devices, Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, China
² State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
³ Frontier Science Center for Quantum Information, Beijing 100084, China
⁴ Beijing Academy of Quantum Information Sciences, Beijing 100193, China
⁵ Southern University of Science and Technology, Shenzhen 518055, China

Comptes Rendus. Physique, Recent advances in 2D material physics, Volume 22 (2021) no. S4, pp. 163-182.

Résumé

The superconductivity confined in a two-dimensional interface exhibits many exotic phenomena that have certain counterparts in layered cuprates and iron-based superconductors, and thus provides rare opportunities to reveal the mystery of high temperature superconductivity therein. By constructing and tailoring hybrid heterostructures such as FeSe/ ${SrTiO}_{3}$ (FeSe/STO), interface-enhanced superconductivity arouses, and the substrate has been demonstrated to provide the phonons and enhance the strong electron–phonon coupling (EPC) within monolayer FeSe. More research and reporting systems uncover that the band-bending induced charge transfer at the interface could become a unified microscopic picture to design the new interface superconductors. With re-examination of the experimental research in ${LaAlO}_{3}$ /STO (LAO/STO) and unconventional superconductors, the common characteristics such as band bending and rigid band shift are perceived in the FeSe/STO, LAO/STO and cuprate superconductors. This review may provide important information to inspect the mechanism of high- $T_{c}$ superconductivity from a different view.

Première publication : 2021-10-05
Publié le : 2022-03-08

DOI : 10.5802/crphys.87

Mots-clés : Interface superconductivity, FeSe/SrTiO

_{3}

, Band bending, Rigid shift, Electron–phonon coupling, High-

T_{c}

superconductivity

Affiliations des auteurs :

Sha Han ^{1, 2} ; Can-Li Song ^{3, 2} ; Xu-Cun Ma ^{3, 2} ; Qi-Kun Xue ^{4, 3, 5, 2}

¹ CAS Key Laboratory of Nanophotonic Materials and Devices, Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, China
² State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
³ Frontier Science Center for Quantum Information, Beijing 100084, China
⁴ Beijing Academy of Quantum Information Sciences, Beijing 100193, China
⁵ Southern University of Science and Technology, Shenzhen 518055, China

Licence :

CC-BY 4.0

Droits d'auteur : Les auteurs conservent leurs droits

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     pages = {163--182},
     publisher = {Acad\'emie des sciences, Paris},
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Sha Han; Can-Li Song; Xu-Cun Ma; Qi-Kun Xue. Interface enhanced superconductivity in FeSe/SrTiO$_{3}$ and the hidden nature. Comptes Rendus. Physique, Recent advances in 2D material physics, Volume 22 (2021) no. S4, pp. 163-182. doi : 10.5802/crphys.87. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.87/

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