Autor: Zakrzewski, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetic Characterization of Molecular Beam Epitaxy Grown $Cd_{1-x}$Mn$\text{}_{x}$Te Structures
Autorzy:: Sawicki, M.
Kolesnik, S.
Wojtowicz, T.
Karczewski, G.
Janik, E.
Kutrowski, M.
Żakrzewski, A.
Dynowska, E.
Dietl, T.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1931934.pdf
Data publikacji:: 1995-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.-y
75.50.Rr
75.50.Ee
Opis:: The paper reports on the application of SQUID magnetometry to probe magnetic ion distribution in epilayers and at interfaces of diluted magnetic semiconductors. We present also new results on the possible influence of the magnetic confinement on the formation of the spin-glass phase, and on antiferromagnetic phase transition in zinc-blende MnTe.
Źródło:: Acta Physica Polonica A; 1995, 87, 1; 169-172
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Temperature Study of Photoluminescence from Deep CdTe/Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te Quantum Wells
Autorzy:: Kutrowski, M.
Wojtowicz, T.
Karczewski, G.
Kopalko, K.
Zakrzewski, A. K.
Janik, E.
Grasza, K.
Łusakowska, E.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1876361.pdf
Data publikacji:: 1995-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.20.Dx
78.55.Et
Opis:: The photoluminescence studies in CdTe/CdMnTe quantum wells are reported in the temperature range 10-300 K. The MnTe concentration in the barriers is x = 0.3, 0.5, 0.63 and 0.68. Thus the potential wells in our samples are very deep, of the order of ≈ 800 meV in the conduction band and ≈ 200 meV in the valence band in the case of the x = 0.68 sample. In spite of the large lattice mismatch (related to high x value) between the wells and the barriers the observed line widths are as narrow as 2 meV in the case of 100 Å. Clear manifestations of internal strain are observed. In particular, the temperature coefficient of the luminescence energies shows strong dependence on the width of wells.
Źródło:: Acta Physica Polonica A; 1995, 87, 2; 500-504
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Luminescence Decay in Deep Quantum Wells CdTe/Cd_{0.5}Mn_{0.5}Te at Room Temperature
Autorzy:: Kowalczyk, L.
Fancey, S.
Buller, G.
Massa, J.
Kutrowski, M.
Janik, E.
Karczewski, G.
Wojtowicz, T.
Zakrzewski, A.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1876908.pdf
Data publikacji:: 1995-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.66.Hf
78.47.+p
78.55.Et
Opis:: Time-resolved photoluminescence was used to study exciton recombination in deep CdTe/Cd_{0.5}Mn_{0.5}Te single quantum well. The width of the investigated well was 100 A. The study was performed at room temperature. The lifetime of the exciton determined in this work has a value comparable to that observed in shallow CdTe/Cd_{0.85}Mn_{0.15}Te quantum wells. A strong enhancement of the photoluminescence decay time with increasing intensity of the exciting laser beam is observed which is indicative of saturation of the non-radiative recombination centers.
Źródło:: Acta Physica Polonica A; 1995, 87, 2; 508-513
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Indium Doping of CdTe Grown by Molecular Beam Epitaxy
Autorzy:: Karczewski, G.
Zakrzewski, A.
Kutrowski, M.
Jaroszyński, J.
Dobrowolski, W.
Grodzicka, E.
Janik, E.
Wojtowicz, T.
Kossut, J.
Barcz, A.
Powiązania:: https://bibliotekanauki.pl/articles/1932089.pdf
Data publikacji:: 1995-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.55.Ln
73.61.Ga
Opis:: We report on n-type indium doping of CdTe films grown by molecular beam epitaxy on (001) GaAs substrates. By adjusting the flux of In atoms we can precisely control the carrier concentration over three orders of magnitude - from 8 × 10$\text{}^{14}$ up to 1.3 × 10$\text{}^{18}$ cm$\text{}^{-3}$. In agreement with earlier reports we confirmed that Cd overpressure plays an important role in the doping process. The doping appears to be most effective for Cd/Te pressure ratio of 1.5. For this value of Cd/Te pressure ratio essentially 100% efficiency of doping is achieved at low In concentrations (< 10$\text{}^{18}$ cm$\text{}^{-3}$). At higher In concentrations acceptor impurities compensate shallow donors limiting the concentration of free carriers.
Źródło:: Acta Physica Polonica A; 1995, 87, 1; 241-244
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Digital Magnetic Quantum Wells for the Study of Interface Sharpness of Molecular Beam Epitaxy Grown Structures
Autorzy:: Wojtowicz, T.
Karczewski, G.
Żakrzewski, A.
Kutrowski, M.
Janik, E.
Dynowska, E.
Kopalko, K.
Kret, S.
Kossut, J.
Laval, J. Y.
Powiązania:: https://bibliotekanauki.pl/articles/1931933.pdf
Data publikacji:: 1995-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.20.Dx
78.55.Et
Opis:: We report on the growth and basic characterization of digital magnetic quantum wells, that is, quantum wells in which the well material is itself a short period superlattice composed of alternating diluted magnetic and nonmagnetic semiconductor layers each only a few monolayers thick. These novel structures can be useful in a variety of studies, including studies of barrier-well interface sharpness.
Źródło:: Acta Physica Polonica A; 1995, 87, 1; 165-168
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Cubic MnTe - Growth by Molecular Beam Epitaxy and Basic Structural Characterization
Autorzy:: Zakrzewski, A.
Janik, E.
Dynowska, E.
Leszczyński, M.
Kutrowski, M.
Wojtowicz, T.
Karczewski, G.
Bąk-Misiuk, J.
Domagała, J.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1873112.pdf
Data publikacji:: 1995-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Pp
68.55.Bd
68.55.Jk
Opis:: We report on growth by molecular beam epitaxy of thick layers of MnTe with zinc blende structure. Films as thick as 5.6 µm were obtained. Characterization by X-ray diffraction proved their good structural quality. We determined the lattice constant and its temperature dependence. Broad luminescence due to internal Mn$\text{}^{2+}$- transitions was observed. It showed an unexpected temperature dependence.
Źródło:: Acta Physica Polonica A; 1995, 87, 2; 433-436
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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