Detecting Magnetic Switching in Single-Molecule Magnet Mn<sub>12</sub> using Graphene Quantum Dots
ORAL
Abstract
Transport measurements through a graphene quantum dot device decorated with single-molecule magnet (SMM) Mn12 powder indicate stochastic switching of the magnetization in the molecules. Here we show that discrete changes in the graphene conductance can be attributed to magnetic switching of the molecules. The local magnetic field causes a change in the activation energy of the hot electrons in the quantum dot [1], allowing the graphene device to serve as a sensitive detector for the spin state of the proximate molecules and as a probe to measure the interaction between the SMMs and the graphene. The size of the activation energy change is too large to be explained by Zeeman effects owing to the dipole field, suggesting an exchange bias interaction between the graphene and the molecules.
[1] A. El Fatimy et al. Nature Nanotechnology 11, 335-338 (2016)
*This work was funded by the National Science Foundatation and the Ofice of Naval Research
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Presenters
DaVonne Henry
Georgetown University
Authors
DaVonne Henry
Georgetown University
Amjad Alqahtani
Georgetown University
luke st marie
Georgetown University
Samuel I Felsenfeld
University of Maryland, College Park
Lubomir Havlicek
Central European Institute of Technology, Brno Unversity of Technology
CEITEC, Brno University of Technology
Jakub Hruby
National High Magnetic Field Laboratory
Antonin Sojka
Central European Institute of Technology, Brno Unversity of Technology
Jorge Navarro
Central European Institute of Technology, Brno Unversity of Technology
Abdelouahad El Fatimy
Institute of Applied Physics, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco.
Mohammed VI Polytechnic University
Rachael L Myers-Ward
US Naval Research Laboratory
U.S. Naval Research Laboratory
David K Gaskill
University of Maryland
U.S. Naval Reserach Laboratory
U.S. Naval Research Laboratory
Daniel Pennachio
US Naval Research Laboratory
U.S. Naval Reserach Laboratory
U.S. Naval Research Laboratory
Jenifer Hajzus
US Naval Research Laboratory
U.S. Naval Reserach Laboratory
ASEE Research Associate at the U.S. Naval Research Laboratory
Albert F Rigosi
National Institute of Standards and Technology
NIST
Ivan Nemec
Central European Institute of Technology
CEITEC, Brno University of Technology
Petr Neugebauer
brno university of Technology, CEITEC
Central European Institute of Technology, CEITEC BUT, Purkynova 656/123, Brno 61200, Czech Republic
