Superconductivity in ternary iron pnictides: AFe2As2 (A = alkali metal) and LiFeAs

被引：24

作者：

Gooch, M. ^{[1
,2
]}

Lv, B. ^{[1
,3
]}

Sasmal, K. ^{[1
,2
]}

Tapp, J. H. ^{[1
,3
]}

Tang, Z. J. ^{[1
,3
]}

Guloy, A. M. ^{[1
,3
]}

Lorenz, B. ^{[1
,2
]}

Chu, C. W. ^{[1
,2
,4
]}

机构：

[1] Univ Houston, TCSUH, Houston, TX 77204 USA

[2] Univ Houston, Dept Phys, Houston, TX 77204 USA

[3] Univ Houston, Dept Chem, Houston, TX 77204 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

Pnictide superconductors; AFe(2)As(2); LiFeAs; Magnetization; PRESSURE;

D O I：

10.1016/j.physc.2009.10.096

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconductivity is observed in AFe(2)As(2) (A = Cs, Rb, K) at temperatures below 4 K. The metastable compound NaFe2As2 displays superconductivity with a high T-c = 25 K. These compounds are considered to be strongly hole-overdoped. The stoichiometric LiFeAs is superconducting below 18K. The origin of superconductivity in LiFeAs is critically investigated and we show that Li deficiency cannot explain the experimental results. We propose that superconducting LiFeAs is stoichiometric and it is equivalent to the high-pressure state of other undoped iron pnictides. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：S276 / S279

页数：4

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