Quantum turnstile operation of single-molecule magnets

Date
2015
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Source Title
New Journal of Physics
Print ISSN
0217-9792
Electronic ISSN
1367-2630
Publisher
Institute of Physics Publishing
Volume
17
Issue
Pages
1 - 12
Language
English
Type
Article
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Abstract

The time-dependent transport through single-molecule magnets coupled to magnetic or non-magnetic electrodes is studied in the framework of the generalized master equation method. We investigate the transient regime induced by the periodic switching of the source and drain contacts. If the electrodes have opposite magnetizations the quantum turnstile operation allows the stepwise writing of intermediate excited states. In turn, the transient currents provide a way to read these states. Within our approach we take into account both the uniaxial and transverse anisotropy. The latter may induce additional quantum tunneling processes which affect the efficiency of the proposed read-and-write scheme. An equally weighted mixture of molecular spin states can be prepared if one of the electrodes is ferromagnetic. © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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Keywords
Magnetic qubits, Quantum turnstile, Single-molecule magnets, Electrodes, Magnetism, Magnets, Molecules, Generalized master equations, Magnetic qubits, Opposite magnetization, Periodic switching, Quantum turnstile, Single-molecule magnet, Time-dependent transport, Transverse anisotropy, Quantum theory
Citation
Published Version (Please cite this version)