A scanning tunneling microscope utilizes radio-frequency signals to detect single spin transitions in a terbium ion (red) sandwiched between two phthalocyanine molecules (green) on a gold substrate (yellow).
From the article:
Radio Frequency Scanning Tunneling Spectroscopy for Single-Molecule Spin ResonanceStefan Müllegger, Stefano Tebi, Amal K. Das, Wolfgang Schöfberger, Felix Faschinger, and Reinhold Koch
Phys. Rev. Lett. 113, 133001 (2014)
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