An RF antenna capacitively coupled to an STM tip achieves near-unity microwave delivery to the tunnel junction, enabling single-atom EPR at 4 K with about 1 microelectronvolt energy resolution and frequency-modulated detection.
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Single-atom electron paramagnetic resonance in a scanning tunneling microscope driven by a radiofrequency antenna at 4 K
An RF antenna capacitively coupled to an STM tip achieves near-unity microwave delivery to the tunnel junction, enabling single-atom EPR at 4 K with about 1 microelectronvolt energy resolution and frequency-modulated detection.