Hund’s correlated Metals
2018-05
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Hund’s correlated Metals
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2018-05
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Abstract
Metallic phases with Hund’s correlations (“Hund’s metals”) are presently the focus of intensive
research, in particular in relation to unconventional Fe-based superconductors.
Recent experiments validate this emerging theoretical picture of a metallic phase with evidences of
large local paramagnetic moments, large and orbital-selective mass renormalizations and orbitallyselective
pairing in the superconducting state.
Further theoretical insight shows that Hund’s coupling can also alter the quasiparticle interactions
in some regimes, thus potentially renormalizing the pairing strength. This is shown to correlate with
experimental high-Tc superconductivity in Fe-based pnictides and FeSe.
Additionally, specular many-body physics is predicted for Cr-based analogues of these materials,
possibly indicating a new playground where high-Tc superconductors might be found.
L. de’ Medici, Phys. Rev. Lett. 118, 167003 (2017)
P. Villar-Arribi and L. de’ Medici, ArXiv:1803.01494 (2018)
Edelmann et al. PRB 95, 205118 (2017)
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deMedici, Luca. (2018). Hund’s correlated Metals. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/197540.
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