Autor: Pisarski, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Resonant States of a Momentum-Dependent Impurity Potential in a d-Wave Superconductor
Autorzy:: Pisarski, P.
Harań, G.
Powiązania:: https://bibliotekanauki.pl/articles/1812293.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.Rp
74.62.Dh
74.72.-h
Opis:: Nonmagnetic impurity on-site potential leads to the resonant states in a d-wave superconductor for the unitary scattering limit. We extend the above study to include a momentum dependence of the impurity potential and discuss the existence and number of resonant states for a tetragonal anisotropy of the scattering potential.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 153-157
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Quasiparticle Interference in a Superconducting State with a Fourfold Phase Change
Autorzy:: Pisarski, P.
Harań, G.
Powiązania:: https://bibliotekanauki.pl/articles/2047342.pdf
Data publikacji:: 2007-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.Rp
74.25.Jb
74.62.Dh
Opis:: Quantum interference revealed in Bi$\text{}_{2}$Sr$\text{}_{2}$Ca Cu$\text{}_{2}$O$\text{}_{8+δ}$ by Fourier transform scanning spectroscopy is primarily determined by maxima of the joint density of states which correspond to an octet of scattering wave vectors connecting points at the constant quasiparticle energy contours where the density of states is maximal. We consider a superconductor with a constant quasiparticle density of states where the interference is due to the fourfold change in the phase of the order parameter. Our results may be helpful in a discussion of the interference in a d-wave superconductor at the tunneling energy exceeding the gap magnitude.
Źródło:: Acta Physica Polonica A; 2007, 111, 5; 791-794
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: d-Wave Superconductivity in a System with Open Boundary Conditions
Autorzy:: Pisarski, P.
Harań, G.
Powiązania:: https://bibliotekanauki.pl/articles/2041464.pdf
Data publikacji:: 2004-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.Rp
74.72.-h
74.78.Na
74.81.-g
Opis:: We discuss the d-wave superconductivity in confined geometry by imposing open boundary conditions on the attractive Hubbard model. Within the Bogoliubov-de Gennes approach we evaluate the order parameter and charge density distribution in the system.
Źródło:: Acta Physica Polonica A; 2004, 106, 5; 721-725
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: s-Wave Order Parameter in the Presence of a Momentum-Dependent Impurity Scattering Potential
Autorzy:: Rudzińska, D.
Pisarski, P.
Harań, G.
Powiązania:: https://bibliotekanauki.pl/articles/1812291.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.62.Dh
74.78.-w
74.81.-g
Opis:: Momentum dependence of the impurity potential leads to the anisotropy of a local density of states in isotropic s-wave superconductors. We complete this result by discussing the influence of a momentum-dependent impurity potential on the s-wave order parameter. The scattering process is considered in the T-matrix approximation, and the model impurity potential consists of two separate terms representing isotropic (on-site) and anisotropic (momentum-dependent) parts of the potential. We show that the effect of the isotropic part on the order parameter is local whereas the influence of the momentum-dependent term is nonlocal.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 149-152
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Investigation of As Grown and Induced Structural Defects in SrLaXO$\text{}_{4}$ (x = Al, Ga) Crystals
Autorzy:: Ryba-Romanowski, W.
Gołąb, S.
Dereń, P.
Dominiak-Dzik, G.
Pisarski, W.
Gloubokov, A.
Powiązania:: https://bibliotekanauki.pl/articles/1964366.pdf
Data publikacji:: 1997-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Hx
42.70.Hj
Opis:: SrLaGaO$\text{}_{4}$ and SrLaAlO$\text{}_{4}$ substrates grown by the Czochralski method have no twins or subgrains however they show strong tendency to form point defects. The nature of these defects is not well understood yet. They may be associated with deviations from stoichiometry andor oxygen atoms located in the interstitial positions. Virtually all title crystals grown by the Czochralski method display various colours from light green to deeply red owing to light absorption by point defects. Absorption centres appear to be very stable in time and resistant to usual thermal treatment. UV excitation increases the density of defects and gives rise to strong photoluminescence, otherwise too weak to be observed.
Źródło:: Acta Physica Polonica A; 1997, 92, 1; 191-196
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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