AI Article Synopsis
- Understanding the Fermi surface and low-energy excitations of iron or cobalt pnictides is important for studying electronic instabilities like magnetism and superconductivity.
- The authors introduce a new method to analyze low-energy properties in correlated electron materials, incorporating advanced screening effects and local dynamical correlations.
- This approach successfully clarifies the inconsistency in the behavior of BaCo2As2, which traditional methods predicted to show a ferromagnetic instability that isn't observed experimentally.
Article Abstract
Understanding the Fermi surface and low-energy excitations of iron or cobalt pnictides is crucial for assessing electronic instabilities such as magnetic or superconducting states. Here, we propose and implement a new approach to compute the low-energy properties of correlated electron materials, taking into account both screened exchange beyond the local density approximation and local dynamical correlations. The scheme allows us to resolve the puzzle of BaCo2As2, for which standard electronic structure techniques predict a ferromagnetic instability not observed in nature.
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| http://dx.doi.org/10.1103/PhysRevLett.113.266403 | DOI Listing |
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