Tunable (δπ, δπ)-Type Antiferromagnetic Order in α-Fe(Te,Se) Superconductors

被引：595

作者：

Bao, Wei ^{[1
,2
]}

Qiu, Y. ^{[3
,4
]}

Huang, Q. ^{[3
]}

Green, M. A. ^{[3
,4
]}

Zajdel, P. ^{[3
,5
]}

Fitzsimmons, M. R. ^{[2
]}

Zhernenkov, M. ^{[2
]}

Chang, S. ^{[3
]}

Fang, Minghu ^{[6
,7
]}

Qian, B. ^{[6
]}

Vehstedt, E. K. ^{[6
]}

Yang, Jinhu ^{[7
]}

Pham, H. M. ^{[8
]}

Spinu, L. ^{[8
]}

Mao, Z. Q. ^{[6
]}

机构：

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

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

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

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

[5] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 24期

关键词：

SPIN-DENSITY-WAVE; PHASE-DIAGRAM; SYSTEMS;

D O I：

10.1103/PhysRevLett.102.247001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The new alpha-Fe(Te,Se) superconductors share the common iron building block and ferminology with the LaFeAsO and BaFe(2)As(2) families of superconductors. In contrast with the predicted commensurate spin-density-wave order at the nesting wave vector (pi, 0), a completely different magnetic order with a composition tunable propagation vector (delta pi, delta pi) was determined for the parent compound Fe(1+y)Te in this powder and single-crystal neutron diffraction study. The new antiferromagnetic order survives as a short-range one even in the highest T(C) sample. An alternative to the prevailing nesting Fermi surface mechanism is required to understand the latest family of ferrous superconductors.

引用

页数：4

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*EPAPS, EPRLTAO103063927 EPA

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