The Kondo Effect of a Molecular Tip As a Magnetic Sensor | Zendy

Léo Garnier | Zendy; Benjamin Verlhac | Zendy; Paula Abufager | Zendy; Nicolás Lorente | Zendy; M. Ormaza | Zendy; L. Limot | Zendy

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The Kondo Effect of a Molecular Tip As a Magnetic Sensor

Author(s) -

Léo Garnier,

Benjamin Verlhac,

Paula Abufager,

Nicolás Lorente,

M. Ormaza,

L. Limot

Publication year - 2020

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/acs.nanolett.0c03271

Subject(s) - cobaltocene , kondo effect , chemistry , condensed matter physics , spin (aerodynamics) , resonance (particle physics) , scanning tunneling microscope , molecule , atom (system on chip) , kondo insulator , molecular physics , physics , atomic physics , impurity , ferrocene , organic chemistry , electrode , computer science , electrochemistry , thermodynamics , embedded system

A single molecule offers to tailor and control the probing capability of a scanning tunneling microscope when placed on the tip. With the help of first-principles calculations, we show that on-tip spin sensitivity is possible through the Kondo ground state of a spin S = 1/2 cobaltocene molecule. When attached to the tip apex, we observe a reproducible Kondo resonance, which splits apart upon tuning the exchange coupling of cobaltocene to an iron atom on the surface. The spin-split Kondo resonance provides quantitative information on the exchange field and on the spin polarization of the iron atom. We also demonstrate that molecular vibrations cause the emergence of Kondo side peaks, which, unlike the Kondo resonance, are sensitive to cobaltocene adsorption.

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