Temat: 85.80.Fi - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Non-Linear Thermal Current through Multilevel Quantum Dot Coupled to Ferromagnetic Electrodes
Autorzy:: Wierzbicki, M.
Świrkowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/1427586.pdf
Data publikacji:: 2012-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.23.Hk
73.50.Lw
85.80.Fi
Opis:: We present studies of spin-dependent phenomena in the non-linear energy transport through a multilevel quantum dot/molecule in the Coulomb blockade regime. Calculations are performed within the framework of non-equilibrium Green function formalism based on the equation of motion. Thermal current flowing through the system due to temperature gradient significantly varies with gate voltage. It depends on relative orientation of magnetic moments in the electrodes, so in analogy to tunneling magnetoresistance the magnetothermal conductance is introduced, which describes the effect.
Źródło:: Acta Physica Polonica A; 2012, 121, 5-6; 1204-1206
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Measuring of Electric Parameters of Graphene in Presence of Temperature Gradient
Autorzy:: Inglot, M.
Trybus, M.
Woś, B.
Ciuk, T.
Powiązania:: https://bibliotekanauki.pl/articles/1402561.pdf
Data publikacji:: 2015-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 85.80.Fi
73.50.Lw
84.60.Rb
Opis:: Graphene is one of the most promising materials for application in electronics. It has been recently discovered that on certain substrates graphene is characterized by a rather strong spin-orbit interaction, which is valuable to spintronics applications. In this paper we present an application of a system for measuring of graphene's electrical parameters. The idea of a measuring system originates from the measurements of the pyroelectric coefficient of ferroelectric samples. After a simple modification the system can be used for various experiments related to the determination of electric response of samples exposed to a temperature gradient. Test measurements of monolayer graphene samples and their thermoelectric response are presented.
Źródło:: Acta Physica Polonica A; 2015, 128, 2; 166-169
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Electrical and Heat Currents in Nanoscopic System with Ferromagnetic Electrodes of Non-Collinear Magnetic Moments
Autorzy:: Wierzbicki, M.
Świrkowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/1426962.pdf
Data publikacji:: 2012-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.23.Hk
73.50.Lw
85.80.Fi
Opis:: Thermoelectric properties of nanoscopic system composed of a single-level quantum dot attached to ferromagnetic electrodes are studied with the use of the non-equilibrium Green function formalism. Electrical and heat currents flowing through the system under temperature gradient and bias voltage are calculated in the non-linear regime. Both charge and heat currents strongly depend on configuration of magnetic moments in the leads. TMR ratio is mostly positive, but in a region of small bias voltages, where the electron flow is determined by the temperature gradient, electrical current in parallel and antiparallel configurations flows in opposite directions leading to considerable negative TMR.
Źródło:: Acta Physica Polonica A; 2012, 121, 5-6; 1073-1075
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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