Reproduction of reentrant supercurrent data in a closed quantum dot

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Fig. 4 Reproduction of reentrant supercurrent data in a closed quantum dot. Reproduction of reentrant supercurrent data in a closed quantum dot. (A) Schematics of device 2. (B) Color plot of G(Vbg, Vsg) for device 2. The data include the contribution of the series resistance (RS = 51.37 kilohms) in the measurement circuit. White color corresponds to a nondissipative superconducting regime where G = 1/RS. (C) Stability diagram, dI/dV(Vbg, V), measured at the position of the red line in (B) at T = 0.75 K, i.e., just above Tc. A Kondo ridge at odd filling is indicated by an arrow. (D) Zeeman splitting of the Kondo resonance in the normal state taken in the middle of this Kondo ridge at 0.1-T increments. The traces are vertically shifted by −0.025e2/h for clarity. (E) B evolution of fitted Ic(Vbg) at the blue line in (B) and for different B (no offset). In the Kondo valley, Ic shows a reentrant behavior, vanishing at a crossover field B* ≈ 0.3 T and reemerging for B > B*, heralding a ground-state transition from a Kondo singlet to a spin-split doublet. (F) Crossover field, B*, versus Vsg as extracted from the B evolution of Ic at the corresponding linecuts in (B). The error bars are determined by the 0.1-T increment in B, as in (E). J. C. Estrada Saldaña et al. Sci Adv 2019;5:eaav1235 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).