Observation of high- Tc superconductivity in rectangular FeSe/ SrTiO3(110) monolayers

P. Zhang; X. L. Peng; T. Qian; P. Richard; X. Shi; J. Z. Ma; B. B. Fu; Y. L. Guo; Z. Q. Han; S. C. Wang; L. L. Wang; Q. K. Xue; J. P. Hu; Y. J. Sun; H. Ding

doi:10.1103/PhysRevB.94.104510

Observation of high- Tc superconductivity in rectangular FeSe/ SrTiO3(110) monolayers

P. Zhang, X. L. Peng, T. Qian, P. Richard, X. Shi, J. Z. Ma, B. B. Fu, Y. L. Guo, Z. Q. Han, S. C. Wang, L. L. Wang, Q. K. Xue, J. P. Hu, Y. J. Sun, H. Ding

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摘要

We design a monolayer film of FeSe on SrTiO3(110) substrate [FeSe/STO(110)], with a C2 symmetry induced by epitaxial strain. Compared to FeSe on SrTiO3(001) substrate [FeSe/STO(001)], one of the in-plane lattice constants is reduced by 6%, to ∼3.67 Å. FeSe/STO(110) exhibits a large nearly isotropic superconducting gap of 16 meV filled around 60 K, similar to those obtained on FeSe/STO(001) films. Our results strongly suggest that the lattice C4 symmetry is not essential for reaching high Tc's in Fe-based superconductors and pose a new challenge to theory.

源语言	英语
文章编号	104510
期刊	Physical Review B
卷	94
期	10
DOI	https://doi.org/10.1103/PhysRevB.94.104510
出版状态	已出版 - 13 9月 2016
已对外发布	是

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title = "Observation of high- Tc superconductivity in rectangular FeSe/ SrTiO3(110) monolayers",

abstract = "We design a monolayer film of FeSe on SrTiO3(110) substrate [FeSe/STO(110)], with a C2 symmetry induced by epitaxial strain. Compared to FeSe on SrTiO3(001) substrate [FeSe/STO(001)], one of the in-plane lattice constants is reduced by 6%, to ∼3.67 {\AA}. FeSe/STO(110) exhibits a large nearly isotropic superconducting gap of 16 meV filled around 60 K, similar to those obtained on FeSe/STO(001) films. Our results strongly suggest that the lattice C4 symmetry is not essential for reaching high Tc's in Fe-based superconductors and pose a new challenge to theory.",

author = "P. Zhang and Peng, {X. L.} and T. Qian and P. Richard and X. Shi and Ma, {J. Z.} and Fu, {B. B.} and Guo, {Y. L.} and Han, {Z. Q.} and Wang, {S. C.} and Wang, {L. L.} and Xue, {Q. K.} and Hu, {J. P.} and Sun, {Y. J.} and H. Ding",

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doi = "10.1103/PhysRevB.94.104510",

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T1 - Observation of high- Tc superconductivity in rectangular FeSe/ SrTiO3(110) monolayers

AU - Zhang, P.

AU - Peng, X. L.

AU - Qian, T.

AU - Richard, P.

AU - Shi, X.

AU - Ma, J. Z.

AU - Fu, B. B.

AU - Guo, Y. L.

AU - Han, Z. Q.

AU - Wang, S. C.

AU - Wang, L. L.

AU - Xue, Q. K.

AU - Hu, J. P.

AU - Sun, Y. J.

AU - Ding, H.

PY - 2016/9/13

Y1 - 2016/9/13

N2 - We design a monolayer film of FeSe on SrTiO3(110) substrate [FeSe/STO(110)], with a C2 symmetry induced by epitaxial strain. Compared to FeSe on SrTiO3(001) substrate [FeSe/STO(001)], one of the in-plane lattice constants is reduced by 6%, to ∼3.67 Å. FeSe/STO(110) exhibits a large nearly isotropic superconducting gap of 16 meV filled around 60 K, similar to those obtained on FeSe/STO(001) films. Our results strongly suggest that the lattice C4 symmetry is not essential for reaching high Tc's in Fe-based superconductors and pose a new challenge to theory.

AB - We design a monolayer film of FeSe on SrTiO3(110) substrate [FeSe/STO(110)], with a C2 symmetry induced by epitaxial strain. Compared to FeSe on SrTiO3(001) substrate [FeSe/STO(001)], one of the in-plane lattice constants is reduced by 6%, to ∼3.67 Å. FeSe/STO(110) exhibits a large nearly isotropic superconducting gap of 16 meV filled around 60 K, similar to those obtained on FeSe/STO(001) films. Our results strongly suggest that the lattice C4 symmetry is not essential for reaching high Tc's in Fe-based superconductors and pose a new challenge to theory.

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Observation of high- Tc superconductivity in rectangular FeSe/ SrTiO3(110) monolayers

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