Neutron scattering study of spin dynamics in superconducting (Tl, Rb)2Fe4Se5

被引：10

作者：

Chi, Songxue ^{[1
]}

Ye, Feng ^{[1
,2
]}

Bao, Wei ^{[3
]}

Fang, Minghu ^{[4
]}

Wang, H. D. ^{[4
]}

Dong, C. H. ^{[4
]}

Savici, A. T. ^{[5
]}

Granroth, G. E. ^{[1
]}

Stone, M. B. ^{[1
]}

Fishman, R. S. ^{[6
]}

机构：

[1] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[2] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

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

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

[5] Oak Ridge Natl Lab, Neutron Data Anal & Visualizat Div, Oak Ridge, TN 37831 USA

[6] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.87.100501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observed in superconducting (Tl, Rb)(2)Fe4Se5 spin-wave branches that span an energy range from 6.5 to 209 meV. Spin dynamics are successfully described by a Heisenberg localized spin model whose dominant in-plane interactions include only the nearest (J(1) and J(1)') and next nearest neighbor (J(2) and J(2)') exchange terms within and between the tetramer spin blocks, respectively. These experimentally determined exchange constants would crucially constrain the theoretical viewpoints on magnetism and superconductivity in the Fe-based materials. DOI: 10.1103/PhysRevB.87.100501

引用

页数：5

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