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Coexistence of incommensurate magnetism and superconductivity in Fe1+ySexTe1−x


Khasanov, R; Bendele, M; Amato, A; Babkevich, P; Boothroyd, A T; Cervellino, A; Conder, K; Gvasaliya, S N; Keller, H; Klauss, H-H; Luetkens, H; Pomjakushina, E; Roessli, B (2009). Coexistence of incommensurate magnetism and superconductivity in Fe1+ySexTe1−x. Physical Review. B, Condensed Matter and Materials Physics, 80(14):140511.

Abstract

We have studied the superconducting and magnetic properties of Fe1+ySexTe1−x single crystals (0≤x≤0.5) by magnetic susceptibility, muon-spin rotation, and neutron diffraction. We find three regimes of behavior: (i) commensurate magnetic order for x≲0.1, (ii) bulk superconductivity for x∼0.5, and (iii) a range x≈0.25–0.45 in which superconductivity coexists with incommensurate magnetic order. The results are qualitatively consistent with two-band mean-field models in which itinerant magnetism and extended s-wave superconductivity are competing order parameters.

Abstract

We have studied the superconducting and magnetic properties of Fe1+ySexTe1−x single crystals (0≤x≤0.5) by magnetic susceptibility, muon-spin rotation, and neutron diffraction. We find three regimes of behavior: (i) commensurate magnetic order for x≲0.1, (ii) bulk superconductivity for x∼0.5, and (iii) a range x≈0.25–0.45 in which superconductivity coexists with incommensurate magnetic order. The results are qualitatively consistent with two-band mean-field models in which itinerant magnetism and extended s-wave superconductivity are competing order parameters.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2009
Deposited On:14 Jan 2010 14:56
Last Modified:05 Apr 2016 13:45
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.80.140511

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