Temat: 75.20.Hr - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spin Polarized Transport through the Double-Dot System
Autorzy:: Sztenkiel, D.
Świrkowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/2044544.pdf
Data publikacji:: 2005-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.Hr
72.15.Qm
72.25.-b
73.23.Hk
Opis:: Spin-dependent electron transport through two quantum dots in series attached to ferromagnetic electrodes is analyzed within the framework of the non-equilibrium Green function formalism. Regime of a weak coupling between the dots is investigated. I-V characteristics and tunnel magnetoresistance are calculated and discussed in detail.
Źródło:: Acta Physica Polonica A; 2005, 108, 5; 885-890
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Poor Mans Scaling and Green Function Analysis of the Kondo Anomaly in Single-Level Quantum Dots
Autorzy:: Wawrzyniak, M.
Świrkowicz, R.
Wilczyński, M.
Barnaś, J.
Powiązania:: https://bibliotekanauki.pl/articles/1813883.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.Hr
72.15.Qm
72.25.-b
73.23.Hk
Opis:: Kondo effect in a single-level quantum dot attached to magnetic leads is studied theoretically by the "poor man's scaling" and non-equilibrium Green function methods. From the scaling equations we derive the Kondo temperature as a function of the model parameters - in particular as a function of the angle between magnetic moments. Transport characteristics, i.e. differential conductance and tunnel magnetoresistance associated with magnetization rotation, were calculated within the non-equilibrium Green function formalism based on the equation of motion method.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 553-556
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Electronic Transport through the Double-Dot System
Autorzy:: Świrkowicz, R.
Sztenkiel, D.
Powiązania:: https://bibliotekanauki.pl/articles/2038086.pdf
Data publikacji:: 2004-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.Hr
72.15.Qm
72.25.-b
73.23.Hk
Opis:: Electron tunnelling through two quantum dots in series is theoretically studied. A limit of intermediate coupling between the dots is considered. The non-equilibrium Green function formalism is used to calculate electric current and mean number of electrons accumulated on the dots. Lesser and retarded Green functions are calculated in the Hartree-Fock approximation with the use of the equation of motion method. Current flowing through the system calculated in dependency on gate voltages shows two resonant peaks, each peak with two additional shoulders. I-V characteristics and differential conductance in a resonance and out of resonance cases are calculated and discussed.
Źródło:: Acta Physica Polonica A; 2004, 105, 6; 523-528
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Nonequilibrium Kondo Effect in a Single-Channel Quantum Dot Asymmetrically Coupled to Two Ferromagnetic Reservoirs
Autorzy:: Świrkowicz, R.
Wilczyński, M.
Barnaś, J.
Powiązania:: https://bibliotekanauki.pl/articles/2037118.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.Hr
72.15.Qm
72.25.-b
73.23.Hk
Opis:: Nonequilibrium Kondo effect in a quantum dot asymmetrically coupled to two ferromagnetic metallic leads is analyzed theoretically. The nonequilibrium Green function technique is used to calculate density of states and electric current. The lesser and retarded (advanced) Green functions are calculated by the equation of motion method within a consistent approximation scheme. The case where one electrode is half-metallic is analyzed numerically in details.
Źródło:: Acta Physica Polonica A; 2004, 105, 1-2; 149-154
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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