1. Observation of high-Tc superconductivity in rectangular FeSe/SrTiO3(110) monolayers.
- Author
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Zhang, P., Peng, X.-L., Qian, T., Richard, P., Shi, X., Ma, J.-Z., Fu, B. B., Guo, Y.-L., Han, Z. Q., Wang, S. C., Wang, L. L., Xue, Q.-K., Hu, J. P., Sun, Y.-J., and Ding, H.
- Subjects
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SUPERCONDUCTIVITY , *IRON selenides , *MONOMOLECULAR films , *SUBSTRATES (Materials science) , *LATTICE constants - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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