Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor

被引：78

作者：

Argyriou, D. N. ^{[1
]}

Hiess, A. ^{[2
]}

Akbari, A. ^{[3
]}

Eremin, I. ^{[3
,4
]}

Korshunov, M. M. ^{[3
,5
]}

Hu, Jin ^{[6
]}

Qian, Bin ^{[6
]}

Mao, Zhiqiang ^{[6
]}

Qiu, Yiming ^{[7
,8
]}

Broholm, Collin ^{[9
,10
]}

Bao, W. ^{[11
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energy, D-14109 Berlin, Germany

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[3] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[4] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany

[5] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

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

[7] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[8] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[9] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[10] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

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

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 22期

关键词：

NEUTRON-SCATTERING;

D O I：

10.1103/PhysRevB.81.220503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on inelastic neutron-scattering measurements that find itinerantlike incommensurate magnetic excitations in the normal state of superconducting FeTe0.6Se0.4 (T-c=14 K) at wave vector Q(inc) = (1/2 +/- epsilon, 1/2 -/+ epsilon) with epsilon = 0.09(1). In the superconducting state only the lower energy part of the spectrum shows significant changes by the formation of a gap and a magnetic resonance that follows the dispersion of the normal-state excitations. We use a four band model to describe the Fermi-surface topology of this iron-based superconductors with the extended s(+/-) symmetry and find that it qualitatively captures the salient features of these data.

引用

页数：4

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