Chi-Cheng Lee

TL;DR: In this paper, the varying metallic antiferromagnetic correlations observed in iron-based superconductors are unified in a model consisting of both itinerant electrons and localized spins, and the decisive factor is found to be the sensitive competition between the superexchange Antiferromagnetism and the orbital-degenerate double-exchange ferromagnetic magnetism.

TL;DR: In this article, it was shown that for a type-II Weyl cone, if the Weyl point is above the Fermi level, then it is necessary and sufficient to see the band structure above the level to observe a topological Fermis arc.

TL;DR: The observed nondegenerate property of the Fermi arcs is important for establishing its exact topological nature, which reveals that spins on the arc form a novel type of 2D matter, and the nearly full spin polarization observed may be useful in spintronic applications.

TL;DR: In this article, a study of a one-dimensional system may have finally resolved the long-standing discrepancy between the expected and measured inelastic neutron scattering intensities in the high-temperature cuprate superconductors.

TL;DR: In three-dimensional metals, topological objects known as Weyl nodes can arise from a crossing of the conduction and valence bands as discussed by the authors, and experiments under high magnetic fields show how weyl nodes of opposite chiralities can move together to annihilate.