Fig. 4. Modulating time-independent observables.
(A) Average occupation of the nitrogen site atom’s ground state as a function of the driving frequency along with a Lorentzian fit (black line), B = 500 mT. (B) Time-averaged spin-polarized current measured on a copper site atom with easy axis parallel to the external magnetic field, B = 1.5 T (C) Time-averaged spin-polarized current measured on an antiferromagnetically coupled Fe dimer oriented parallel to the external magnetic field, B = 2 T. Insets for all three panels show a constant current topography acquired at Iset = 100 pA and Vset = 100 mV, with a corresponding overlay of the atomic structure (Cu, orange; N, blue; Fe, red). Each panel also includes a schematic description showing the relative orientation of the nanostructure’s ground state (light gray), the spin-polarized tip (dark gray), and the external magnetic field (H).