| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevLett.110.257001 |
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| Auteur | Rechercher : Lu, X.; Rechercher : Gretarsson, H.; Rechercher : Zhang, R.; Rechercher : Liu, X.; Rechercher : Luo, H.; Rechercher : Tian, W.; Rechercher : Laver, M.; Rechercher : Yamani, Z.1; Rechercher : Kim, Y.-J.; Rechercher : Nevidomskyy, A.H.; Rechercher : Si, Q.; Rechercher : Dai, P. |
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| Affiliation | - Conseil national de recherches du Canada. Centre canadien de faisceaux de neutrons du CNRC
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| Format | Texte, Article |
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| Sujet | Antiferromagnetics; Magnetoelastic couplings; Quantum critical points; Quantum criticality; Superconducting state; Synchrotron x rays; Temperature separation; Zero temperatures; Antiferromagnetism; Separation; Superconductivity; Nickel |
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| Résumé | We study the structural and magnetic orders in electron-doped BaFe 2-xNixAs2 by high-resolution synchrotron x-ray and neutron scatterings. Upon Ni doping x, the nearly simultaneous tetragonal-to-orthorhombic structural (Ts) and antiferromagnetic (TN) phase transitions in BaFe2As2 are gradually suppressed and separated, resulting in Ts>TN with increasing x, as was previously observed. However, the temperature separation between Ts and TN decreases with increasing x for x≥0.065, tending toward a quantum bicritical point near optimal superconductivity at x≈0.1. The zero-temperature transition is preempted by the formation of a secondary incommensurate magnetic phase in the region 0.0882;0.104, resulting in a finite value of TN≈Tc+10 K above the superconducting dome around x≈0.1. Our results imply an avoided quantum critical point, which is expected to strongly influence the properties of both the normal and superconducting states. © 2013 American Physical Society. |
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| Date de publication | 2013 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21269888 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | ba14c6ec-f12b-44d0-a299-be0d47963905 |
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| Enregistrement créé | 2013-12-13 |
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| Enregistrement modifié | 2020-04-22 |
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