Temat: 20-27 - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: On the Phase Diagram of Spin-Polarized Attractive Hubbard Model: Weak Coupling Limit
Autorzy:: Kujawa, A.
Micnas, R.
Powiązania:: https://bibliotekanauki.pl/articles/1812269.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
74.20.Rp
71.27.+a
71.10.Hf
Opis:: The superfluid properties of the attractive Hubbard model in a Zeeman magnetic field, and in the weak coupling regime were investigated. The temperature and magnetic field dependences of the order parameter were analyzed. Furthermore, the temperature vs. magnetic field and temperature vs. spin polarization phase diagrams for the 2D and 3D lattices were obtained. For some parameters a reentrant transition was found.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 43-50
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Some Properties of the Spin-Polarized Attractive Hubbard Model
Autorzy:: Kujawa, A.
Micnas, R.
Powiązania:: https://bibliotekanauki.pl/articles/1810407.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
74.20.Rp
71.27.+a
71.10.Hf
Opis:: The influence of a Zeeman magnetic field on the superconducting characteristics of the attractive Hubbard model was investigated. The ground state and temperature phase diagrams were obtained for a fixed number of particles. Two critical magnetic fields were found for the first order phase transition from the superconducting to the normal state for n ≠ 1. For some range of parameters a reentrant transition was found and gapless superconductivity was obtained. The significance of the Hartree term was also analyzed.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 138-140
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The BCS-BEC Crossover and Superconductivity in a Lattice Fermion Model with Hard Core Repulsion
Autorzy:: Kujawa, A.
Powiązania:: https://bibliotekanauki.pl/articles/2047337.pdf
Data publikacji:: 2007-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
74.20.Rp
71.27.+a
71.10.Hf
Opis:: We considered the BCS-BEC crossover at T=0 in the framework of a lattice fermion model (the extended Hubbard model). We analyzed the case of on-site hard core repulsion (U=∞) and intersite attraction (W<0) in a 3D system with extended s-wave pairing symmetry. The mechanisms of density-driven and attraction-strength-driven crossover were analyzed. We obtained the ground state phase diagram. The analyzed quantities are: chemical potential, order parameter, coherence length, and fraction of condensed particles.
Źródło:: Acta Physica Polonica A; 2007, 111, 5; 745-752
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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