A Fermi surface descriptor quantifying the correlations between anomalous Hall effect and Fermi surface geometry
Elena Derunova (IFW Dresden, Max Planck Institute of Microstructure Physics)
Jacob Gayles (University of South Florida Tampa)
Yan Jun Sun (Max Planck Institute for Chemical Physics of Solids)
Michael W. Gaultois (University of Liverpool)
M.N. Ali (TU Delft - QN/Ali Lab, Max Planck Institute of Microstructure Physics)
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Abstract
In the last few decades, basic ideas of topology have completely transformed the prediction of quantum transport phenomena. Following this trend, we go deeper into the incorporation of modern mathematics into quantum material science focusing on geometry. Here we investigate the relation between the geometrical type of the Fermi surface and Anomalous and Spin Hall Effects. An index, HF, quantifying the hyperbolic geometry of the Fermi surface, shows a universal correlation (R2 = 0.97) with the experimentally measured intrinsic anomalous Hall conductivity, of 16 different compounds spanning a wide variety of crystal, chemical, and electronic structure families, including those where topological methods give R2 = 0.52. This raises a question about the predictive limits of topological physics and its transformation into a wider study of bandstructures’ and Fermi surfaces’ geometries and relating them to the quantum geometry theory of a more general metric of eigenstates, opening horizon for the prediction of phenomena beyond topological understanding.
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