検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

First-principles calculations for anisotropy of iron-based superconductors

鉄系超伝導の異方性に対する第一原理計算

中村 博樹 ; 町田 昌彦 ; 小山 富男*; 浜田 典昭*

Nakamura, Hiroki; Machida, Masahiko; Koyama, Tomio*; Hamada, Noriaki*

We perform first-principles calculations for anisotropy of various iron-based superconductors. The anisotropy ratio $$gamma$$$$_{lambda}$$ of the $$c$$-axis penetration depth to the $$ab$$-plane one is relatively small in BaFe$$_2$$As$$_2$$, LiFeAs and FeSe, indicating that the transport applications are promising in these superconductors. On the other hand, in those having perovskite type blocking layers such as Sr$$_2$$ScFePO$$_3$$ we find a very large value, $$gamma$$$$_{lambda}$$ $$_sim^{>}$$ 200, comparable to that in strongly anisotropic high-$$T$$$$_c$$ cuprate Bi$$_2$$Sr$$_2$$CaCu$$_2$$O$$_{8-delta}$$. Thus, the intrinsic Josephson junction stacks are expected to be formed along the $$c$$-axis, and novel Josephson effects due to the multi-gap nature are also suggested in these superconductors. We also examine the doping effect on the anisotropy of LaFeAsO.

Access

:

- Accesses

InCites™

:

パーセンタイル:13.13

分野:Physics, Applied

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.