Tunneling Spectra of Individual Magnetic Endofullerene Molecules

Abstract

The manipulation of single magnetic molecules may enable new strategies for high-density information storage and quantum-state control. However, progress in these areas depends on developing techniques for addressing individual molecules and controlling their spin. Here we report success in making electrical contact to individual magnetic N@C60 molecules and measuring spin excitations in their electron tunneling spectra. We verify that the molecules remain magnetic by observing a transition as a function of magnetic field which changes the spin quantum number and also the existence of nonequilibrium tunneling originating from low-energy excited states. From the tunneling spectra, we identify the charge and spin states of the molecule. The measured spectra can be reproduced theoretically by accounting for the exchange interaction between the nitrogen spin and electron(s) on the C60 cage.

7 pages, 4 figures. Typeset in LaTeX, updated text of previous version

References in corpus (9)

• Coherent control of a single electron spin with electric fields
• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Quantum phase transition in a single-molecule quantum dot
• Bang-bang control of fullerene qubits using ultra-fast phase gates
• Room Temperature Electrical Detection of Spin Coherence in C60
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• Vibration-assisted electron tunneling in C_{140} single-molecule transistors

Cited by in corpus (14)

• Electric Field Controlled Magnetic Anisotropy in a Single Molecule
• Charge transport through single molecules, quantum dots, and quantum wires
• Spin effects in transport through single-molecule magnets in the sequential and cotunneling regimes
• Thermoelectric response of a correlated impurity in the nonequilibrium Kondo regime
• Memristive properties of single-molecule magnets
• Charge fluctuations in nonlinear heat transport
• Effect of finite Coulomb interaction on full counting statistics of electronic transport through single-molecule magnet
• Effects of magnetic field and transverse anisotropy on full counting statistics in single-molecule magnet
• Realization of GHz-frequency impedance matching circuits for nano-scale devices
• Quantum Computing with Endohedral Fullerenes
• Vibrational detection and control of spin in mixed-valence molecular transistors
• Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
• Independent and coherent transitions between antiferromagnetic states of few-molecule systems
• Negative differential conductance and super-Poissonian shot noise in single-molecule magnet junctions