You are not logged in to this journal. Log in    |   Subscription Information

Phys. Rev. Lett. 102, 247001 (2009) [4 pages]

Tunable (deltapi, deltapi)-Type Antiferromagnetic Order in alpha-Fe(Te,Se) Superconductors

Wei Bao,1,2 Y. Qiu,3,4 Q. Huang,3 M. A. Green,3,4 P. Zajdel,3,5 M. R. Fitzsimmons,2 M. Zhernenkov,2 S. Chang,3 Minghu Fang,6,7 B. Qian,6 E. K. Vehstedt,6 Jinhu Yang,7 H. M. Pham,8 L. Spinu,8 and Z. Q. Mao6
1Department of Physics, Renmin University of China, Beijing 100872, China
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
3NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
4Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
5Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
6Department of Physics, Tulane University, New Orleans, Louisiana 70118, USA
7Department of Physics, Zhejiang University, Hangzhou 310027, China
8Department of Physics, University of New Orleans, New Orleans, Louisiana 70148, USA

Received 29 September 2008; published 17 June 2009

The new alpha-Fe(Te,Se) superconductors share the common iron building block and ferminology with the LaFeAsO and BaFe2As2 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 (deltapi, deltapi) was determined for the parent compound Fe1+yTe in this powder and single-crystal neutron diffraction study. The new antiferromagnetic order survives as a short-range one even in the highest TC sample. An alternative to the prevailing nesting Fermi surface mechanism is required to understand the latest family of ferrous superconductors.

©2009 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.102.247001
DOI: 10.1103/PhysRevLett.102.247001
PACS: 74.25.Ha; 61.05.fm; 74.70.-b; 75.30.Fv
  • 74.25.Ha
    Magnetic properties of superconductors
  • 61.05.fm
    Neutron diffraction (condensed matter structure determination)
  • 74.70.-b
    Superconducting materials
  • 75.30.Fv
    Spin-density waves in magnetically ordered materials
  • YEAR: 2009

REFERENCES (35)

For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.

CITING ARTICLES

For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.

EPAPS



A new free weekly publication from APS

Physics - A new free weekly publication from APS
Please visit physics.aps.org
 
Article Tools