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2009 | 115 | 1 | 260-262
Article title

Spin and Charge Current in a Short Semiconducting Chain of Paramagnetic Ionic Blocks

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Languages of publication
EN
Abstracts
EN
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.
Keywords
EN
Year
Volume
115
Issue
1
Pages
260-262
Physical description
Dates
published
2009-01
References
  • 1. R.J. Wojciechowski, A. Lehmann-Szweykowska, R. Micnas, G.A. Gehring, P.E. Wigen, Phys. Rev. B 69, 2144341 (2004)
  • 2. A. Lehmann-Szweykowska, R.J. Wojciechowski, G.A. Gehring, A. Szamer, P.E. Wigen, R. Micnas, Phys. Status Solidi B 244, 2487 (2007)
  • 3. A. Lehmann-Szweykowska, R.J. Wojciechowski, R. Micnas, J. Phys., Conf. Series 104, 012024 (2008)
  • 4. T. Kostyrko, B. Bułka, Mater. Sci. 22, 497 (2004)
  • 5. H. Haug, A.-P. Jauho, Quantum Kinetics in Transport and Optics of Semiconductors, Springer-Verlag, Berlin 1998
  • 6. Y. Meir, N.S. Wingreen, Phys. Rev. Lett. 68, 2512 (1992)
  • 7. T. Kostyrko, B. Bułka, Phys. Rev. B 71, 235306 (2005)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv115n1072kz
Identifiers
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