Fig. 3: Large MR and multistate operation of Dy@C₈₄ SMTs.

a, b Evolution of the N/N\(-\)1 resonant tunneling peaks (marked as red and blue arrows in Fig. 1d) in state 1 (a) and state 2 (b) with respect to magnetic field B when fixing V_sd = 5 mV. The current intensities of these resonance peaks are suppressed by the magnetic field. The inserts show the magnetic field dependence of MR extracted from peak amplitudes of the N/N\(-\)1 resonant tunneling point for state 1 and state 2, indicating high MR ratios of up to 600% for state 1 and 1100% for state 2 at 9 T. c Comparison of the amplitudes of current peaks (labelled 11 to 14 and 21 to 24) in state 1 (S1) and state 2 (S2) under varying magnetic fields (B = 0, 3, 6, 9 T) extracted from (a) and (b). This approach can be used to achieve multistate data storage. (d) Summary of MR values obtained from different molecular devices, namely, FePc (Refs. ^36,37), PTM (Ref. ³⁸), Tempo-OPE (Ref. ³⁹), OPT (Ref. ⁴⁰), Fe₄ (Ref. ⁴¹), and TbPc₂ (Ref. ⁴²), and our device over a range of B. The MR of our study exceeds those of other atomic or molecular devices by nearly an order of magnitude.