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Wyszukujesz frazę "74.72.-v" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Qubits in Double Quantum Well Structure
Autorzy:
Jakubczyk, P.
Majchrowski, K.
Tralle, I.
Powiązania:
https://bibliotekanauki.pl/articles/1032436.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.25.Mk
74.55.+v
03.67.Bg
Opis:
We propose a new approach to producing the qubits in electron ballistic transport in low-dimensional structures such as double quantum wells or double quantum wires. Next, we examine the possibility to produce quantum entanglement in the framework of the Jaynes-Cummings model and shown that at least in principle, the entanglement can be achieved due to series of "revivals" and "collapses" in the population inversion due to the interaction of a quantized single-mode EM-field with a two-level system.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 115-117
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Order and SdH Effect in Half-Heusler Phase ErPdBi
Autorzy:
Pavlosiuk, O.
Filar, K.
Wiśniewski, P.
Kaczorowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/1388106.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.10.+v
75.40.Cx
71.18.+y
71.20.Eh
72.15.Gd
Opis:
Single crystals of ErPdBi were grown from Bi-flux. The crystal structure of MgAgAs-type was confirmed using X-ray diffraction. Magnetization, magnetic susceptibility, electrical resistance and heat capacity measurements revealed an antiferromagnetic phase transition at $T_{N}$ = 1.2 K. At high temperatures, the electrical resistance has a semiconducting-like character (dR/dT < 0 ). The resistance starts decreasing with decreasing T below 15 K and shows a very sharp drop below $T_{N}$ but remains finite down to 0.4 K. Hence, no obvious evidence of superconductivity was found in the electrical transport data. On the other hand, the real part of AC magnetic susceptibility is negative below $T_{C}$ = 1.6 K and its imaginary component has a clear maximum at this temperature that might be associated with the onset of superconducting state. The electrical resistance revealed Shubnikov-de Haas oscillations in magnetic fields 8-33 T. Their amplitude decreases with increasing T and disappears above 10 K. Cyclotron mass determined from this dependence is 0.21 $m_{e}$.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 656-658
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observation of Superconductivity in Highly Cr-Doped GaP Single Crystals
Autorzy:
Gosk, J. B.
Strzelecka, G.
Kowalski, G.
Hruban, A.
Kamińska, M.
Twardowski, A.
Gronkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2046913.pdf
Data publikacji:
2006-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.10.+v
75.50.Pp
61.72.Vv
61.72.Dd
81.10.Dn
Opis:
Studying bulk GaP, highly doped with Cr, and searching for possible ferromagnetic semiconductor in view of spintronic applications, we found superconducting behavior of this material unexpectedly. Magnetization techniques and X-ray diffraction were applied to study these crystals. Magnetization revealed superconducting features up to about 6 K and X-ray studies showed that superconductivity might be related to small size Cr precipitates.
Źródło:
Acta Physica Polonica A; 2006, 110, 2; 189-193
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EPR Effect in Magnetic Dependent Dissipation in High Temperature Superconductors
Autorzy:
Stankowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2043552.pdf
Data publikacji:
2005-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.-h
76.30.-v
Opis:
Electron paramagnetic resonance in ac dissipation was observed due to the Cooper pairs breaking up to their quasiparticle state. This phenomenon is the result of a flux motion on a pinning centers in high temperature superconducting materials. The detection of ac dissipation was performed in a low ac field (15 and 22 MHz) as well as in microwave range. Vortex motion hysteresis loop with magnetic field modulation of 15 Hz was recorded. Besides V-shaped dependence of ac power dissipation P(B), a direct electron paramagnetic resonance signal related to Cooper pairs → quasiparticle fluctuation was observed.
Źródło:
Acta Physica Polonica A; 2005, 108, 2; 243-246
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Magnetic Field Distribution in the Bi2212 superconducting Single Crystal by the Scanning EPR-Probe
Autorzy:
Drulis, H.
Folcik, L.
Drulis, M.
Zaleski, A.
Suleimanov, N. M.
Powiązania:
https://bibliotekanauki.pl/articles/1968771.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.-h
76.30.-v
Opis:
The profile of the magnetic field distribution over the surface of superconducting sample is studied by the scanning an electron paramagnetic resonance microprobe. The magnetic field distribution is mapped from the measurements of the spin probe EPR-signal shift.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 403-407
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Primary Role of Ionic Polarizability in Exotic Superconductivity
Autorzy:
Weger, M.
Powiązania:
https://bibliotekanauki.pl/articles/1933315.pdf
Data publikacji:
1995-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.Kn
74.72.-v
72.15.-h
71.45.Gm
Opis:
The ionic polarizability of organic metals and of high-T$\text{}_{c}$ cuprates is very high while the density of conduction electrons is low. As a result, the ionic polarizability screens out the electronic polarizability for states very close to the Fermi surface. The cut-off is determined by the dispersion of the ionic polarizability. The electron-phonon matrix element is very large for the ionically screened states, and is the cut-off for the electronically screened states. Therefore, the McMillan coupling constant λ$\text{}_{ph}$ is very large at very low energies, and has a low energy cut-off. This model accounts for both normal and superconducting state anomalies in organic metals, as well as cuprates.
Źródło:
Acta Physica Polonica A; 1995, 87, 4-5; 723-733
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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