Common Crystalline and Magnetic Structure of Superconducting A2Fe4Se5 (A = K, Rb, Cs, Tl) Single Crystals Measured Using Neutron Diffraction

被引：206

作者：

Ye, F. ^{[1
]}

Chi, S. ^{[1
]}

Bao, Wei ^{[2
]}

Wang, X. F. ^{[3
,4
]}

Ying, J. J. ^{[3
,4
]}

Chen, X. H. ^{[3
,4
]}

Wang, H. D. ^{[5
]}

Dong, C. H. ^{[5
]}

Fang, Minghu ^{[5
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[2] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

[5] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 13期

关键词：

COEXISTENCE; LIFEAS;

D O I：

10.1103/PhysRevLett.107.137003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single-crystal neutron diffraction studies on superconductors A(2)Fe(4)Se(5), where A Rb, Cs, (Tl, Rb), and (Tl, K) (T-c similar to 30 K), uncover the same Fe vacancy ordered crystal structure and the same block antiferromagnetic order as in K2Fe4Se5. The Fe order-disorder transition occurs at T-S = 500-578 K, and the antiferromagnetic transition at T-N = 471-559 K with an ordered magnetic moment similar to 3.3 mu(B)/Fe at 10 K. Thus, all recently discovered A intercalated iron selenide superconductors share the common crystalline and magnetic structure, which are very different from previous families of Fe-based superconductors, and constitute a distinct new 245 family.

引用

页数：5

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