Sensing the spin of an individual Ce adatom

Abstract

The magnetic moment of rare earth elements originates from electrons in the partially filled 4f orbitals. Accessing this moment electrically by scanning tunneling spectroscopy is hampered by shielding of outer-lying orbitals. Here we show that we can detect the magnetic moment of an individual Ce atom adsorbed on a Cu2N ultrathin film on Cu(100) by using a sensor tip that has its apex functionalized with a Kondo screened spin system. We calibrate the sensor tip by deliberately coupling it to a well characterized Fe atom. Subsequently, we use the splitting of the tip's Kondo resonance when approaching a spectroscopically dark Ce atom to sense its magnetic moment.

5 pages, 3 figures

References in corpus (9)

• Reading and Writing Single-Atom Magnets
• Atomic-scale spin sensing with a single-molecule at the apex of a scanning tunneling microscope
• Tuning the exchange bias on a single atom from 1 mT to 10 T
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• The Spin-Polarization of the Split Kondo State
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• Spin excitations in a 4f-3d heterodimer on MgO

Cited by in corpus (3)

• Electron spin secluded inside a bottom-up assembled standing metal-molecule nanostructure
• Spin and electronic excitations in $4f$ atomic chains on Au(111) substrates
• Probing Kondo spin fluctuations with scanning tunneling microscopy and electron spin resonance