Synthesis, crystal structure, and magnetism of β-Fe1.00(2)Se1.00(3) single crystals

被引：59

作者：

Hu, Rongwei ^{[1
]}

Lei, Hechang ^{[1
]}

Abeykoon, Milinda ^{[1
]}

Bozin, Emil S. ^{[1
]}

Billinge, Simon J. L. ^{[1
,2
]}

Warren, J. B. ^{[3
]}

Siegrist, Theo ^{[4
,5
]}

Petrovic, C. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[2] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[3] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA

[4] Florida State Univ, Dept Chem & Biochem Engn, Tallahassee, FL 32310 USA

[5] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 22期

关键词：

SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.83.224502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Understanding iron-based superconductors requires high-quality impurity-free single crystals. So far they have been elusive for beta-FeSe and extraction of intrinsic materials properties has been compromised by several magnetic-impurity phases. Here, we report synchrotron-clean beta-FeSe superconducting single crystals grown via LiCl/CsCl flux method. Phase purity yields evidence for a defect-induced weak ferromagnetism that coexists with superconductivity below T-c. In contrast to Fe1+y Te-based superconductors, our results reveal that the interstitial Fe(2) site is not occupied and that all contribution to density of states at the Fermi level must come from in-plane Fe(1).

引用

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