High-temperature superconductivity and lattice relaxation in lithium-deposited FeSe on SrTiO3

Giao N. Phan, Kosuke Nakayama, Shota Kanayama, Masato Kuno, Katsuaki Sugawara, Takafumi Sato, Takashi Takahashi

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5 Citations (Scopus)


We studied the effect of strain, interface, and electron doping on the superconductivity in thin FeSe film on SrTiO3 by angle-resolved photoemission spectroscopy (ARPES). We observed the superconductivity with Tc as high as 43 K in a lithium (Li) deposited heavily electron-doped multilayer FeSe film. We found a significant relaxation of tensile strain at the surface in contrast to the case of potassium (K) deposition, although the high-Tc superconductivity is commonly observed in both cases. We discuss the interplay among carrier doping, tensile strain, and high-Tc superconductivity by comparing ARPES results on Li- and K-deposited FeSe films.

Original languageEnglish
Article number033706
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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