Fig. 4: Mediated interaction coefficient in the regime of moderate impurity–medium interactions.
From: Mediated interactions between Fermi polarons and the role of impurity quantum statistics
The experimental results for \(\bar{f}{n}_{\uparrow }/{\epsilon }_{{{{\rm{F}}}}}\) for FB (green circles) and FF (red squares) are compared with equation (3), with \(\bar{f}\) given by the static limit of the Fermi-liquid theory of equation (2) (green and red solid lines refer to FB and FF cases, respectively) for interaction values of ∣X∣ ≳ 1. The plot refers to the repulsive and attractive branches for negative and positive values of X, respectively. The error bars on \(\bar{f}{n}_{\uparrow }/{\epsilon }_{{{{\rm{F}}}}}\) correspond to the uncertainties of the linear fit and the errors on the Fermi energy. The error bars on X, smaller than the symbol size, represent the standard errors for each set of measurements.
