| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevLett.110.257001 |
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| Author | Search for: Lu, X.; Search for: Gretarsson, H.; Search for: Zhang, R.; Search for: Liu, X.; Search for: Luo, H.; Search for: Tian, W.; Search for: Laver, M.; Search for: Yamani, Z.1; Search for: Kim, Y.-J.; Search for: Nevidomskyy, A.H.; Search for: Si, Q.; Search for: Dai, P. |
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| Affiliation | - National Research Council of Canada. NRC Canadian Neutron Beam Centre
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| Format | Text, Article |
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| Subject | 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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| Abstract | 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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| Publication date | 2013 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21269888 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | ba14c6ec-f12b-44d0-a299-be0d47963905 |
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| Record created | 2013-12-13 |
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| Record modified | 2020-04-22 |
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