Fig. 4: Evidence for the Jaccarino-Peter compensation effect in UTe2.
a Angular dependence of the normal-state Hall resistivity at 65 T and 0.7 K of devices #1 and #2, taken from Fig. 3a, b. The blue dashed line is a guide to the eye that highlights the observed strong suppression around θ ≈ 30–35∘. Green diamonds are Hc2 values extrapolated to zero temperature, taken from Fig. 2e. The red dashed line follows \(\cos \theta\). b Strng-coupling constant λ used for describing the experimental Hc2(T) data points presented in Fig. 2e, within the two proposed scenarios: Solid (dashed) lines are with (without) paramagnetic limitation of Hc2, assuming a spin-singlet (spin-triplet-ESP) state. Below Hm at 0∘ (H∥b), the curves are those from ref. 19. Below Hm at 35∘, the curves are scaled by \(1/\cos (\theta )\), assuming that only the b component H determines λ(H). The field dependence of λ above Hm is based on the compensation mechanism in both cases as explained in the main text and in Supplementary Note 5. The spin-singlet result resembles the H dependence reported for the specific heat (for H∥b) or the A coefficient around Hm 19,29,30,31.
