1 research outputs found
Kondo Effect in a Neutral and Stable All Organic Radical Single Molecule Break Junction
Organic radicals are neutral, purely
organic molecules exhibiting an intrinsic magnetic moment due to the
presence of an unpaired electron in the molecule in its ground state.
This property, added to the low spināorbit coupling and weak
hyperfine interactions, make neutral organic radicals good candidates
for molecular spintronics insofar as the radical character is stable
in solid state electronic devices. Here we show that the paramagnetism
of the polychlorotriphenylmethyl radical molecule in the form of a
Kondo anomaly is preserved in two- and three-terminal solid-state
devices, regardless of mechanical and electrostatic changes. Indeed,
our results demonstrate that the Kondo anomaly is robust under electrodes
displacement and changes of the electrostatic environment, pointing
to a localized orbital in the radical as the source of magnetism.
Strong support to this picture is provided by density functional calculations
and measurements of the corresponding nonradical species. These results
pave the way toward the use of all-organic neutral radical molecules
in spintronics devices and open the door to further investigations
into Kondo physics