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Mook HA, Lumsden MD, Christianson AD, et al. Unusual relationship between magnetism and superconductivity in FeTe(0.5)Se(0.5). Phys Rev Lett. 2010;104(18):187002doi: 10.1103/PhysRevLett.104.187002.
Mook, H. A., Lumsden, M. D., Christianson, A. D., Nagler, S. E., Sales, B. C., Jin, R., McGuire, M. A., Sefat, A. S., Mandrus, D., Egami, T., & dela Cruz, C. (2010). Unusual relationship between magnetism and superconductivity in FeTe(0.5)Se(0.5). Physical review letters, 104(18), 187002. https://doi.org/10.1103/PhysRevLett.104.187002
Mook, H A, et al. "Unusual relationship between magnetism and superconductivity in FeTe(0.5)Se(0.5)." Physical review letters vol. 104,18 (2010): 187002. doi: https://doi.org/10.1103/PhysRevLett.104.187002
Mook HA, Lumsden MD, Christianson AD, Nagler SE, Sales BC, Jin R, McGuire MA, Sefat AS, Mandrus D, Egami T, dela Cruz C. Unusual relationship between magnetism and superconductivity in FeTe(0.5)Se(0.5). Phys Rev Lett. 2010 May 07;104(18):187002. doi: 10.1103/PhysRevLett.104.187002. Epub 2010 May 06. PMID: 20482201.
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Phys Rev Lett. 2010 May 07;104(18):187002. doi: 10.1103/PhysRevLett.104.187002. Epub 2010 May 06.

Unusual relationship between magnetism and superconductivity in FeTe(0.5)Se(0.5).

Physical review letters

H A Mook, M D Lumsden, A D Christianson, S E Nagler, Brian C Sales, Rongying Jin, Michael A McGuire, Athena S Sefat, D Mandrus, T Egami, Clarina dela Cruz

Affiliations

  1. Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. [email protected]

PMID: 20482201 DOI: 10.1103/PhysRevLett.104.187002

Abstract

We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe(0.5)Se(0.5). Two types of excitations are found, a resonance at (0.5,0.5,0) and incommensurate fluctuations on either side of this position. We show that the two sets of magnetic excitations behave differently with doping, with the resonance being fixed in position while the incommensurate excitations move as the doping is changed. These unusual results show that a common behavior of the low energy magnetic excitations is not necessary for pairing in these materials.

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