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      Quantum turnstile operation of single-molecule magnets

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      Author
      Moldoveanu, V.
      Dinu, I. V.
      Tanatar, Bilal
      Moca, C. P.
      Date
      2015
      Source Title
      New Journal of Physics
      Print ISSN
      0217-9792
      Electronic ISSN
      1367-2630
      Publisher
      Institute of Physics Publishing
      Volume
      17
      Pages
      1 - 12
      Language
      English
      Type
      Article
      Item Usage Stats
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      103
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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.
      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
      Permalink
      http://hdl.handle.net/11693/21325
      Published Version (Please cite this version)
      http://dx.doi.org/10.1088/1367-2630/17/8/083020
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      • Department of Physics 2299
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