@article{8d687aba5f1d433a99ccaaec3a9e976f,
title = "Electronic structure of a Bi2Te3/FeTe heterostructure: Implications for unconventional superconductivity",
abstract = "We have performed angle-resolved photoemission spectroscopy on a heterostructure consisting of topological insulator Bi2Te3 and iron chalcogenide FeTe fabricated on SrTiO3 substrate by molecular-beam-epitaxy technique. This system was recently found to show the superconductivity albeit nonsuperconducting nature of each constituent material. Upon interfacing FeTe with two quintuple layers of Bi2Te3, we found that the Dirac-cone surface state of Bi2Te3 is shifted toward higher binding energy, while the holelike band at the Fermi level originating from FeTe moves toward lower binding energy. This suggests that electron charge transfer takes place from FeTe to Bi2Te3 through the interface. The present result points to the importance of hole-doped FeTe interface for the occurrence of unconventional superconductivity.",
author = "Kenta Owada and Kosuke Nakayama and Ryuji Tsubono and Koshin Shigekawa and Katsuaki Sugawara and Takashi Takahashi and Takafumi Sato",
note = "Funding Information: This work was supported by JST-PRESTO (No. JPMJPR18L7), JST-CREST (No. JPMJCR18T1), MEXT of Japan (Innovative Area Topological Materials Science JP15H05853), JSPS (JSPS KAKENHI No. JP17H04847, No. JP17H01139, and No. JP18H01160), and KEK-PF (Proposal No. 2018S2-001) Funding Information: We thank M. Kuno and T. Sato for their assistance in the ARPES experiments. This work was supported by JST-PRESTO (No. JPMJPR18L7), JST-CREST (No. JPMJCR18T1), MEXT of Japan (Innovative Area “Topological Materials Science” JP15H05853), JSPS (JSPS KAKENHI No. JP17H04847, No. JP17H01139, and No. JP18H01160), and KEK-PF (Proposal No. 2018S2-001). Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = aug,
day = "21",
doi = "10.1103/PhysRevB.100.064518",
language = "English",
volume = "100",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "6",
}