Search for spin resonance in the first nitrogen-containing iron pnictide superconductor ThFeAsN
Antiferromagnetic fluctuation is one of the most possible candidates driven the electron pairing and superconductivity in unconventional superconductors. The most promnent features in these materials is the neutron spin resonance, which is an enhancement of spin excitations at a particular energy on cooling below the superconducting transition temperature. So far as we known, the resonance energy discovered in all copper-oxide and iron-pnictide superconductors is linearly scaling with Tc. Recently, Wang et al. has discovered the first nitrogen-containing iron pnictide superconductors ThFeAsN.Unlike other 1111 families such as oxides, fluorides and hydrides with same structure, this new material show bulk superconductivity below 30 K without any obvious anomaly but metallic behavior of resistivity. It is still not clear that whether this system shares similar origin of such high superconductivity with other iron-based families or not. Thus we propose to search the magnetic excitations as well as spin resonance in this unique nitride iron-based superconductors.
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Huiqian Luo; D.T. Adroja; IVANOV Alexandre and MAO Huican. (2017). Search for spin resonance in the first nitrogen-containing iron pnictide superconductor ThFeAsN. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-501
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