Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2014,（1）
• 页码范围: 156-160
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/31/1/017401

摘要

We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO3 s u bstrates with non-superconducting FeTe protection layers by molecular beam epitaxy for ex situ studies.By direct transport and magnetic measurements,we provide definitive evidence for high temperature superconductivity in the 1-UC FeSe films with an onset TC above 40 K and an extremely large critical current density JC～1.7×106 A/cm2 at 2 K,which are much higher than TC～8K and JC～104 A/cm2 for bulk FeSe,respectively.Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.