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Universal Substrate Effect on the Superconductivity of FeSe Monolayer Films
- Source :
- Phys. Rev. Lett. 118, 067002 (2017)
- Publication Year :
- 2016
-
Abstract
- To elucidate the mechanisms behind the enhanced $T_c$ in monolayer (1ML) FeSe on SrTiO$_3$ (STO), we grew highly strained 1ML FeSe on the rectangular (100) face of rutile TiO$_2$, and observed the coexistence of replica bands and superconductivity with a $T_c$ of 63 K. From the similar $T_c$ between this system and 1ML FeSe on STO (001), we conclude that strain and dielectric constant are likely unimportant to the enhanced $T_c$ in these systems. A systematic comparison of 1ML FeSe on TiO$_2$ with other systems in the FeSe family shows that while charge transfer alone can enhance $T_c$, it is only with the addition of interfacial electron-phonon coupling that $T_c$ can be increased to the level seen in 1ML FeSe on STO.<br />Comment: 5 pages, 3 figures
- Subjects :
- Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 118, 067002 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1606.09358
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.118.067002