Autor: Tobijaszewska, B. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Phase Fluctuations and BCS-LP Crossover in 2D Short Coherence Length Superconductors
Autorzy:: Tobijaszewska, B.
Micnas, R.
Powiązania:: https://bibliotekanauki.pl/articles/2012966.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.-z
71.10.Fd
74.20.Fg
74.20.Mn
74.72.-h
Opis:: We study the effects of phase fluctuations in 2D short-coherence length superconductors on the basis of the extended Hubbard model with intersite attraction. In the Kosterlitz-Thouless scenario the critical temperatures for anisotropic pairings were determined and compared with the ones from BCS Hartree-Fock approximation. The Uemura-type plots, i.e. the critical temperature vs. zero temperature phase stiffness, were obtained for extended s-wave and $d_{x^{2}-y^{2}}$-wave pairings. We also discuss the crossover from BCS to local pair superconductivity for d-wave pairing.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 393-397
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Mixed State in t-U-J-V Model
Autorzy:: Tobijaszewska, B.
Bak, M.
Powiązania:: https://bibliotekanauki.pl/articles/1810406.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.-z
74.20.Rp
74.25.Dw
71.10.Fd
71.27.+a
Opis:: The t-U-J-V model in the U → ∞ limit is treated by renormalized mean-field theory for arbitrary electron density. Superconductivity of s+id symmetry is found in the large parts of the phase diagram. Calculations also show a possibility of phase separation.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 135-137
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Charge Ordering and Phase Separations in the Spinless Fermion Model with Repulsive Intersite Interaction
Autorzy:: Czart, W.
Robaszkiewicz, S.
Tobijaszewska, B.
Powiązania:: https://bibliotekanauki.pl/articles/1812286.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
71.30.+h
71.45.Lr
64.75.Gh
Opis:: We study a simple effective model for description of charge orderings in narrow band materials, i.e. the spinless fermion model with repulsive intersite interaction W. The analysis is concentrated on the problem of phase separations and the effects of next-nearest neighbor hopping $t_2$ on the charge ordered states in this system. The cases of d-dimensional (d≥2) hypercubic lattices are considered for arbitrary particle concentration (0 < n < 1). Within the broken symmetry Hartree-Fock approximation the phase diagrams as a function of W and n are evaluated for representative cases. The results for $t_2$ ≠ 0 are compared with those found for the case with nearest neighbor hopping only.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 129-134
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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