- Tytuł:
- Spin and Charge Current in a Short Semiconducting Chain of Paramagnetic Ionic Blocks
- Autorzy:
-
Lehmann-Szweykowska, A.
Wojciechowski, R.
Micnas, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1810512.pdf
- Data publikacji:
- 2009-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
72.25.Dc
73.61.Le
73.63.Rt - Opis:
- We deal with the electric current flowing through a short chain of paramagnetic ionic blocks, coupled to metallic electrodes in the serial configuration. An original three-band Hubbard-Anderson Hamiltonian is diagonalised at the level of the single ionic block. A minimal but sufficient set of the latter's four hybridised eigenstates serves as a basis for the determination of the time-ordered temperature-dependent matrix Green functions, in terms of which all the current-voltage (I-V) characteristics can be expressed provided the coupling to the electrodes is weak. The separation of the opposite-spin contributions to the electric current and, consequently, the spin current from the left to right electrode can result from the on-site Coulomb repulsion term of Hubbard-Anderson Hamiltonian, with no spin polarisation at the electrodes, but with the Zeeman-like coupling of the centre to either a molecular or an external magnetic field.
- Źródło:
-
Acta Physica Polonica A; 2009, 115, 1; 260-262
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł