期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 469, 期 9-12, 页码 507-511出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2009.03.037
关键词
122-Type iron pnictides; Superconducting energy gaps
资金
- Slovak R&D Agency [VVCE-0058-07, APVV-0346-07, LPP-0101-06]
- US Steel Kosice
- US Department of Energy, Basic Energy Sciences [DE-AC02-07CH11358]
A brief overview of the superconducting energy gap studies on 122-type family of iron pnictides is given. It seems that the situation in the hole doped Ba1-xKxFe2As2 is well resolved. Most of the measurements including the presented here point contact Andreev reflection spectra agree on existence of multiple nodeless gaps in the excitation spectrum of this multiband system. The gaps have basically two sizes the small one with a strength up to the BCS weak coupling limit and the large one with a very strong coupling with 2 Delta(L)/kT(c) > 6-8. In the electron doped Ba(Fe1-xCox)(2)As-2 the most of the experiments including our point contact measurements reveal in quite broadened spectra only a single gap with a strong coupling strength. The high precision ARPES measurements on this system identified two gaps but very close to each other, both showing a strong coupling with 2 Delta/kT(c) similar to 5 and 6, respectively. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据