This title appears in the Scientific Report :
2015
Please use the identifier:
http://hdl.handle.net/2128/8749 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.89.235438 in citations.
Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving a spin impurity
Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving a spin impurity
Conventional and spin-related thermoelectric effects in transport through a magnetic tunnel junction with a large-spin impurity, such as a magnetic molecule or atom, embedded into the corresponding barrier are studied theoretically in the linear-response regime. The impurity is described by the gian...
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Personal Name(s): | Misiorny, Maciej (Corresponding Author) |
---|---|
Barnaś, Józef | |
Contributing Institute: |
JARA-FIT; JARA-FIT Theoretische Nanoelektronik; PGI-2 |
Published in: | Physical Review B Physical review / B, 89 89 (2014 2014) 23 23, S. 235438 235438 |
Imprint: |
College Park, Md.
APS
2014
|
DOI: |
10.1103/PhysRevB.89.235438 |
Document Type: |
Journal Article |
Research Program: |
Spin-based and quantum information |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.89.235438 in citations.
Conventional and spin-related thermoelectric effects in transport through a magnetic tunnel junction with a large-spin impurity, such as a magnetic molecule or atom, embedded into the corresponding barrier are studied theoretically in the linear-response regime. The impurity is described by the giant spin Hamiltonian, with both uniaxial and transverse magnetic anisotropy taken into account. Owing to the presence of the transverse component of magnetic anisotropy, the spin of a tunneling electron can be reversed during scattering on the impurity, even in the low-temperature regime. This reversal appears due to the exchange interaction of tunneling electrons with the magnetic impurity. We calculate Seebeck and spin Seebeck coefficients, and analyze their dependence on various parameters of the spin impurity and tunnel junction. In addition, conventional and spin figures of merit as well as the electronic contribution to heat conductance are considered. We also show that pure spin current can be driven by a spin bias applied to the junction with spin impurity, even if no electron transfer between the electrodes can take place. The underlying mechanism employs single-electrode tunneling processes (electrode-spin exchange interaction) and the impurity as an intermediate reservoir of angular momentum. |