Abstract
To elucidate the mechanisms behind the enhanced in monolayer (1 ML) FeSe on (STO), we grew highly strained 1 ML FeSe on the rectangular (100) face of rutile , and observed the coexistence of replica bands and superconductivity with a of 63 K. From the similar between this system and 1ML FeSe on STO (001), we conclude that strain and dielectric constant are likely unimportant to the enhanced in these systems. A systematic comparison of 1 ML FeSe on with other systems in the FeSe family shows that while charge transfer alone can enhance , it is only with the addition of interfacial electron-phonon coupling that can be increased to the level seen in 1 ML FeSe on STO.
- Received 30 June 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.067002
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