Fig. 5: Fermi surface hotspots and f-induced 3D character of cylindrical warping.
From: Pressure-enhanced f-electron orbital weighting in UTe2 mapped by quantum interferometry
a–d The ambient pressure FS of UTe2, constructed from our tight-binding approximation guided by dHvA measurements35,36. Red (blue) colouring denotes areas of high (low) f-orbital contribution. Areas of higher curvature are found where there is a high f-contribution at the Fermi level. e Using the z-component of a unit vector projected normal to the Fermi surface as a measure of how 3D-like the cylindrical FS warping is, we see that for zero f-orbital contribution there is no z-component to the FS normal. Therefore, in the absence of f electrons the calculated FS is strictly 2D. Conversely, increasing f-electron contribution is associated with an increase in the 3D character of the FS cylinders, caused by an increase in the cylindrical warping.
