Fig. 2: Detecting the net spin in a bipartite nanographene monomer via Kondo resonance. | Nature Communications

Fig. 2: Detecting the net spin in a bipartite nanographene monomer via Kondo resonance.

From: Designer spin order in diradical nanographenes

Fig. 2

a Chemical structure of a rhombic bipartite nanographene. b Nc-AFM frequency shift image (Resonant frequency: 29 KHz, Oscillation amplitude: 160 pm) of the nanographene in a. The methyl group is imaged as a bright protrusion due to strong Pauli repulsion. c–d Constant-height current image (Bias voltage: 1 mV) and simulated LDOS map. e dI/dV spectra taken on the two locations marked on the inset current image. A sharp zero-energy peak is resolved due to the screening of the net spin of S = 1/2 in nanographene by Au(111) surface electrons. f Out-of-plane magnetic field dependence of the Kondo resonance. All dI/dV spectra were taken at the same position. g Temperature dependence of the Kondo resonance. All dI/dV spectra were taken at the same position. The dotted lines are simulated curves using a Frota function. h The full peak width at half maximum as a function of temperature. A Kondo temperature of 39 K is obtained. Scale bars: 0.3 nm.

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