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ELECTRON NEMATICITY

Go for a spin

Nature Physics volume 18, pages 738–739 (2022)Cite this article

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Analysis of the anisotropy of the magnetic excitations in the nematic state of an iron-based superconductor suggests that this phase is driven primarily by spin fluctuations.

The nematic state in iron-based systems is signalled by a structural transition that lowers the symmetry of the lattice. At the same time, transport and electronic properties become strongly anisotropic and the electronic bands develop a splitting in energy due to the orbitals’ response to the lower symmetry. Identifying the origin of nematicity is not easy because spin, electronic orbital and lattice degrees of freedom are all intimately coupled2.

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Fig. 1: Schematic representation of the spin excitations of FeSe in the iron plane.

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Authors and Affiliations

  1. International School for Advanced Studies SISSA/ISAS, Trieste, Italy

    Laura Fanfarillo

  2. University of Florida, Gainesville, FL, USA

    Laura Fanfarillo

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  1. Laura Fanfarillo
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Correspondence to Laura Fanfarillo.

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Fanfarillo, L. Go for a spin. Nat. Phys. 18, 738–739 (2022). https://doi.org/10.1038/s41567-022-01624-w

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