Transient dynamics through a magnetic tunnel junction
ORAL
Abstract
We present a model study on the time-dependent charge transport through a magnetic
tunnel junction. Magnetic fluctuation in the central region of the tunnel junctions is
modelled as magnons, and its influence on the tunneling is treated as a local bosonic
mode described by the spinless Anderson-Holstein model. Using Keldysh nonequilibrium
Green's function we compute the time dependent current with various type of source
drain bias. Dressed tunneling approximation is used to handle the strong electron-magnon
or other bosonic modes interaction. We analyze the phase diagram of the transient time as
a function of different parameters of the model system, and explore the regions for fast
switching which is useful for device making.
tunnel junction. Magnetic fluctuation in the central region of the tunnel junctions is
modelled as magnons, and its influence on the tunneling is treated as a local bosonic
mode described by the spinless Anderson-Holstein model. Using Keldysh nonequilibrium
Green's function we compute the time dependent current with various type of source
drain bias. Dressed tunneling approximation is used to handle the strong electron-magnon
or other bosonic modes interaction. We analyze the phase diagram of the transient time as
a function of different parameters of the model system, and explore the regions for fast
switching which is useful for device making.
*We acknowledge the funding support by Taiwan's MOST (grant no. 106-2112-M-017 -002 -MY3 and 103-2112-M-017 -002 -MY3)
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Presenters
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Narasimha Raju Chebrolu
- Physics, National Kaohsiung Normal University