A model of spin-polarised charge transport in magnetic oxides

Lehmann-Szweykowska, A.; Wojciechowski, Ryszard; Micnas, R.

doi:10.1088/1742-6596/104/1/012024

Cited by 1 publication

(4 citation statements)

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“…i = 1, 2, 3 labels the ionic blocks and µ = 1, 2, 3, 4 labels their respective eigenstates [1][2][3]. In our convention, m s is the spin number projection, attached to the states µ = 1, 3, whereas −m s is the spin number projection of µ = 2, 4.…”

Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

“…In the new basis, consisting of the four hybridised eigenstates per a block, creation (Ψ + µi ) and annihilation (Ψ µi ) fermion operators are defined (cf. [3][4][5]). Consequently, the truncated Hamiltonian of the chain coupled to the metallic electrodes can be rewritten in a simple quadratic form [1]:…”

Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

“…For m s -contribution to the current µ 1 , µ 1 = 1, 3, whereas for −m s -contribution µ 1 , µ 1 = 2, 4. The anticommutator retarded Green functions can be derived with the equation-of-motion technique [3][4][5]. The method yields two separate sets, each of six linear equations, for two spin orientations.…”

Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

“…A point symmetry of the outer blocks is different from that of the middle one [3,4]. The outer blocks are coupled to non-interacting metallic electrodes in a serial configuration.…”

Section: Introductionmentioning

confidence: 99%

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

2009

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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.

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Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

Section: Cluster Energy Structure and The Currentmentioning

confidence: 99%

“…A point symmetry of the outer blocks is different from that of the middle one [3,4]. The outer blocks are coupled to non-interacting metallic electrodes in a serial configuration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations