Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82

被引：591

作者：

Fang, M. H. ^{[1
]}

Pham, H. M. ^{[2
,3
]}

Qian, B. ^{[1
]}

Liu, T. J. ^{[1
]}

Vehstedt, E. K. ^{[1
]}

Liu, Y. ^{[4
]}

Spinu, L. ^{[2
,3
]}

Mao, Z. Q. ^{[1
]}

机构：

[1] Tulane Univ, Dept Phys, New Orleans, LA 70118 USA

[2] Univ New Orleans, Dept Phys, New Orleans, LA 70148 USA

[3] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

[4] Penn State Univ, Dept Phys, University Pk, PA 16801 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 22期

基金：

美国国家科学基金会;

关键词：

antiferromagnetic materials; commensurate-incommensurate transformations; fluctuations in superconductors; high-temperature superconductors; iron compounds; neutron diffraction; phase diagrams; selenium compounds;

D O I：

10.1103/PhysRevB.78.224503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report our study of the evolution of superconductivity and the phase diagram of the ternary Fe(Se1-xTex)(0.82) (0 <= x <= 1.0) system. We discovered a superconducting phase with T-c,T-max=14 K in the 0.3 < x < 1.0 range. This superconducting phase is suppressed when the sample composition approaches the end member FeTe0.82, which exhibits an incommensurate antiferromagnetic order. We discuss the relationship between the superconductivity and magnetism of this material system in terms of recent results from neutron-scattering measurements. Our results and analyses suggest that superconductivity in this class of Fe-based compounds is associated with magnetic fluctuations and therefore may be unconventional in nature.

引用

页数：5

共 20 条

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