Monday, July 29, 2013

1307.7046 (Fabian Donat Natterer et al.)

Distinction of Nuclear Spin States with the Scanning Tunneling

Fabian Donat Natterer, François Patthey, Harald Brune
We demonstrate rotational excitation spectroscopy with the scanning tunneling microscope for physisorbed hydrogen and its isotopes hydrogen-deuterid and deuterium. The observed excitation energies are very close to the gas phase values and show the expected scaling with moment of inertia. Since these energies are characteristic for the molecular nuclear spin states we are able to identify the para and ortho species of hydrogen and deuterium, respectively. We thereby demonstrate nuclear spin sensitivity with unprecedented spatial resolution.
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