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Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with Superconductivity in BaFe2-xNixAs2

Published

Author(s)

Huiqian Luo, Rui Zhang, Mark Laver, Zahra Yamani, Meng Wang, Xingye Lu, Miaoyin Wang, Yanchao Chen, Shiliang Li, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai

Abstract

Superconductivity in the iron pnictide develops near antiferromagnetism, and the antiferromagnetic (Af) phase appears to overlap with the superconducting phase in some materials such as BaFe2-x(Co,NI)xAs2. Here we use neutron scattering to demonstrate that genuine long-range AF order and superconductivity do not coexsist in BaFe2-xNixAs2 near optimal superconductivity. In addition, we find no evidence for a magnetic quantum critical poing between the A and superconducting phases. Instead, the data reveal the incommensurate short-range AF order coexists and competes with superconductivity, where the AF spin correlation length is comparable to the superconducting shoerence length.
Citation
Physical Review Letters
Volume
108
Issue
24

Keywords

Iron superconductor, Neutron Scattering, Magnetic Order, Spin Excitations, doping dependence, Commensurate antiferromagnetism, Incommensurate antiferromagnetism

Citation

Luo, H. , Zhang, R. , Laver, M. , Yamani, Z. , Wang, M. , Lu, X. , Wang, M. , Chen, Y. , Li, S. , Chang, S. , Lynn, J. and Dai, P. (2012), Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with Superconductivity in BaFe<sub>2-x</sub>Ni<sub>x</sub>As<sub>2</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910435 (Accessed April 16, 2024)
Created June 11, 2012, Updated October 12, 2021