Mechanically Stable Kondo Resonance in an Organic Radical Molecular Junction

IF 3.3 3区 化学 Q2 CHEMISTRY, PHYSICAL The Journal of Physical Chemistry C Pub Date : 2025-01-30 DOI:10.1021/acs.jpcc.4c05860
Tristan Bras, Chunwei Hsu, Thomas Y. Baum, David Vogel, Marcel Mayor, Herre S. J. van der Zant
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Abstract

Organic radicals are promising candidates for molecular spintronics due to their intrinsic magnetic moment, their low spin–orbit coupling, and their weak hyperfine interactions. Using a mechanically controlled break junction setup at both room and low temperatures (6 K), we analyze the difference in charge transport between two nitronyl nitroxide radicals (NNR): one with a backbone in the para configuration, the other with a backbone in the meta configuration. We find that para-NNR displays a Kondo resonance at 6 K, while meta-NNR does not. Additionally, the observed Kondo peak in the differential conductance has a roughly constant width independent of the conductance, consistent with a scenario where the molecule is coupled asymmetrically to the electrodes.

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来源期刊
The Journal of Physical Chemistry C
The Journal of Physical Chemistry C 化学-材料科学:综合
CiteScore
6.50
自引率
8.10%
发文量
2047
审稿时长
1.8 months
期刊介绍: The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.
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