Unusual relationship between magnetism and superconductivity in FeTe0.5Se0.5

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

doi:10.1103/PhysRevLett.104.187002

Unusual relationship between magnetism and superconductivity in FeTe0.5Se0.5

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

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66 Scopus citations

Abstract

We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe0.5Se0.5. 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.

Original language	English
Article number	187002
Journal	Physical Review Letters
Volume	104
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.104.187002
State	Published - May 6 2010

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10.1103/PhysRevLett.104.187002

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title = "Unusual relationship between magnetism and superconductivity in FeTe0.5Se0.5",

abstract = "We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe0.5Se0.5. 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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doi = "10.1103/PhysRevLett.104.187002",

language = "English",

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T1 - Unusual relationship between magnetism and superconductivity in FeTe0.5Se0.5

AU - Mook, H. A.

AU - Lumsden, M. D.

AU - Christianson, A. D.

AU - Nagler, S. E.

AU - Sales, Brian C.

AU - Jin, Rongying

AU - McGuire, Michael A.

AU - Sefat, Athena S.

AU - Mandrus, D.

AU - Egami, T.

AU - Dela Cruz, Clarina

PY - 2010/5/6

Y1 - 2010/5/6

N2 - We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe0.5Se0.5. 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.

AB - We use neutron scattering to study magnetic excitations in crystals near the ideal superconducting composition of FeTe0.5Se0.5. 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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DO - 10.1103/PhysRevLett.104.187002

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VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 187002

ER -

Unusual relationship between magnetism and superconductivity in FeTe0.5Se0.5

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