A Triplet Resonance in Superconducting FeSe0.4Te0.6

Details A Triplet Resonance in Superconducting FeSe0.4Te0.6 A Triplet Resonance in Superconducting FeSe0.4Te0.6

2010-02-08

arxiv.org/abs/1002.1617v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

From heavy fermions to cuprates and iron pnictides, a spin resonance is a staple of nearly magnetic superconductors. Possible explanations include a two-particle bound state or loss of magnon damping in the superconductor. While both scenarios suggest a central role for magnetic fluctuations, distinguishing them is important to identify the right theoretical framework and to guide the search for higher temperature superconductors. Using inelastic neutron scattering technique, we show that the spin resonance in optimally doped Fe(Se,Te) splits into three peaks in a high magnetic field, a signature of a two-particle triplet bound state

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