Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases.
We have used inelastic neutron scattering and muon-spin rotation to compare the low energy magnetic excitations in single crystals of superconducting Fe(1.01)Se(0.50)Te(0.50) and non-superconducting Fe(1.10)Se(0.25)Te(0.75). We confirm the existence of a spin resonance in the superconducting phase o...
| Hauptverfasser: | , , , , , , , |
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| Format: | Journal article |
| Sprache: | English |
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2010
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| _version_ | 1826305510206341120 |
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| author | Babkevich, P Bendele, M Boothroyd, A Conder, K Gvasaliya, SN Khasanov, R Pomjakushina, E Roessli, B |
| author_facet | Babkevich, P Bendele, M Boothroyd, A Conder, K Gvasaliya, SN Khasanov, R Pomjakushina, E Roessli, B |
| author_sort | Babkevich, P |
| collection | OXFORD |
| description | We have used inelastic neutron scattering and muon-spin rotation to compare the low energy magnetic excitations in single crystals of superconducting Fe(1.01)Se(0.50)Te(0.50) and non-superconducting Fe(1.10)Se(0.25)Te(0.75). We confirm the existence of a spin resonance in the superconducting phase of Fe(1.01)Se(0.50)Te(0.50), at an energy of 7 meV and a wavevector of (1/2, 1/2, 0). The non-superconducting sample exhibits two incommensurate magnetic excitations at (1/2, 1/2, 0) ± (0.18, - 0.18, 0) which rise steeply in energy, but no resonance is observed at low energies. A strongly dispersive low energy magnetic excitation is also observed in Fe(1.10)Se(0.25)Te(0.75) close to the commensurate antiferromagnetic ordering wavevector (1/2 - δ, 0, 1/2), where δ≈0.03. The magnetic correlations in both samples are found to be quasi-two-dimensional in character and persist well above the magnetic (Fe(1.10)Se(0.25)Te(0.75)) and superconducting (Fe(1.01)Se(0.50)Te(0.50)) transition temperatures. |
| first_indexed | 2024-03-07T06:33:55Z |
| format | Journal article |
| id | oxford-uuid:f6f5badc-4ffc-42e8-878c-4958f960ff03 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:33:55Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:f6f5badc-4ffc-42e8-878c-4958f960ff032022-03-27T12:38:59ZMagnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f6f5badc-4ffc-42e8-878c-4958f960ff03EnglishSymplectic Elements at Oxford2010Babkevich, PBendele, MBoothroyd, AConder, KGvasaliya, SNKhasanov, RPomjakushina, ERoessli, BWe have used inelastic neutron scattering and muon-spin rotation to compare the low energy magnetic excitations in single crystals of superconducting Fe(1.01)Se(0.50)Te(0.50) and non-superconducting Fe(1.10)Se(0.25)Te(0.75). We confirm the existence of a spin resonance in the superconducting phase of Fe(1.01)Se(0.50)Te(0.50), at an energy of 7 meV and a wavevector of (1/2, 1/2, 0). The non-superconducting sample exhibits two incommensurate magnetic excitations at (1/2, 1/2, 0) ± (0.18, - 0.18, 0) which rise steeply in energy, but no resonance is observed at low energies. A strongly dispersive low energy magnetic excitation is also observed in Fe(1.10)Se(0.25)Te(0.75) close to the commensurate antiferromagnetic ordering wavevector (1/2 - δ, 0, 1/2), where δ≈0.03. The magnetic correlations in both samples are found to be quasi-two-dimensional in character and persist well above the magnetic (Fe(1.10)Se(0.25)Te(0.75)) and superconducting (Fe(1.01)Se(0.50)Te(0.50)) transition temperatures. |
| spellingShingle | Babkevich, P Bendele, M Boothroyd, A Conder, K Gvasaliya, SN Khasanov, R Pomjakushina, E Roessli, B Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title | Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title_full | Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title_fullStr | Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title_full_unstemmed | Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title_short | Magnetic excitations of Fe(1+y)Se(x)Te(1-x) in magnetic and superconductive phases. |
| title_sort | magnetic excitations of fe 1 y se x te 1 x in magnetic and superconductive phases |
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