www.nature.com/scientificreports OPEN Origin of the emergence of higher Tc than bulk in iron chalcogenide thin films Received: 6 March 2017 Accepted: 8 August 2017 Published: xx xx xxxx Sehun Seo1, Jong-Hoon Kang2, Myeong Jun Oh3, Il-Seok Jeong1, Jianyi Jiang4, Genda Gu5, Jung-Woo ...