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^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

68 Citations (Scopus)

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 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.

Original language	English
Article number	104510
Journal	Physical Review B
Volume	94
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.94.104510
Publication status	Published - 13 Sept 2016
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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@article{b6cfee65f58245bca24880aed9779559,

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",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2016",

month = sep,

day = "13",

doi = "10.1103/PhysRevB.94.104510",

language = "English",

volume = "94",

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TY - JOUR

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.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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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U2 - 10.1103/PhysRevB.94.104510

DO - 10.1103/PhysRevB.94.104510

M3 - RGC 21 - Publication in refereed journal

SN - 2469-9950

VL - 94

JO - Physical Review B

JF - Physical Review B

IS - 10

M1 - 104510

ER -

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

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