Temat: 72.10.Fk - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Peculiarities of Electron Transport in PbTe:Cr due to Presence of Resonant Impurity State
Autorzy:: Grodzicka, E.
Dobrowolski, W.
Kossut, J.
Story, T.
Witkowska, B.
Powiązania:: https://bibliotekanauki.pl/articles/1929686.pdf
Data publikacji:: 1993-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.20.Fr
72.10.Fk
72.80.Jc
Opis:: The results of transport investigation of Pb$\text{}_{1-x}$Cr$\text{}_{x}$Te (x ≤ 0.009) in temperature range 3.5-300 K are presented. The obtained electron concentration and electron mobility vs. temperature and Cr concentration data are interpreted and discussed within the model assuming that Cr in PbTe forms a donor state resonant with the conduction band.
Źródło:: Acta Physica Polonica A; 1993, 84, 3; 599-603
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Electron Scattering and the Band Structure of Mixed Crystals Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se
Autorzy:: Skierbiszewski, C.
Wilamowski, Z.
Suski, T.
Kossut, J.
Witkowska, B.
Powiązania:: https://bibliotekanauki.pl/articles/1923803.pdf
Data publikacji:: 1992-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.10.Fk
72.20.Fr
72.80.Jc
Opis:: In this paper the dependence of the band structure and the electron scattering mechanisms on the molar fraction x are studied in Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se. The crossover from the zero-gap band to the open band-gap configuration at x ≈ 0.08 is predicted. We explain the drop of the electron mobility for x > 0.002 by the alloy scattering mechanism.
Źródło:: Acta Physica Polonica A; 1992, 82, 5; 809-812
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Pressure Study of Charged Donor Ordering in HgSe Doped with Iron and Gallium
Autorzy:: Skierbiszewski, C.
Suski, T.
Kossut, J.
Wilamowski, Z.
Dobrowolski, W.
Witkowska, B.
Powiązania:: https://bibliotekanauki.pl/articles/1891020.pdf
Data publikacji:: 1991-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.10.Fk
72.20.Fr
72.80.Jc
Opis:: Transport experiments (Hall effect and conductivity) under hydrostatic pressure up to 1 GPa at liquid helium temperatures on HgSe: Fe, Ga (N$\text{}_{Fe}$ = 2 x 10$\text{}^{19}$ cm$\text{}^{-3}$; 0 ≤ N$\text{}_{Ga}$ ≤ 10$\text{}^{19}$ cm$\text{}^{-3}$) were performed. The results show that the gallium co-doping of HgSe:Fe decreases the degree of spatial correlations between charged impurities. Under the hydrostatic pressure, used as a tool for changing the ratio of the charged to neutral impurities, this effect is even more pronounced. A qualitative agreement between the calculation within the short-range correlation model and our experimental data is achieved.
Źródło:: Acta Physica Polonica A; 1991, 80, 3; 401-404
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: HgSe Based Mixed Crystals Doped with Fe Resonant Donors
Autorzy:: Dobrowolski, W.
Powiązania:: https://bibliotekanauki.pl/articles/1943963.pdf
Data publikacji:: 1996-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.20.Fr
72.10.Fk
71.55.Gs
Opis:: The article reviews the physical properties of semimagnetic semiconductors of the type Hg$\text{}_{1-x-y}$Fe$\text{}_{x}$A$\text{}_{y}^{II}$Se$\text{}_{1-z}$B$\text{}_{z}^{VI}$ and Hg$\text{}_{1-x-y}$Fe$\text{}_{x}$Mn$\text{}_{y}$Se. Optical, magnetooptical, transport and magnetotransport experiments showed that in Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se substitutional iron forms a resonant donor state whose energy is superimposed on the conduction band continuum. Resulting anomalous properties of electron scattering rate, i.e. strong enhancement of electron mobility (or drop of Dingle temperature), which occur in Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se at low temperatures in a certain Fe concentration range, are described. Next, theoretical models describing this anomalous reduction of the scattering rate are discussed. The description of thermomagnetic, optical, magnetooptical and magnetic properties of Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se, with emphasis on features originating from the peculiar iron level position in the band structure of Hg$\text{}_{1-x}$Fe$\text{}_{x}$Se, conclude the first part of the present paper. In the second part the physical properties of the semiconducting alloys Hg$\text{}_{1-x}$Mn$\text{}_{x}$Se:Fe, Hg$\text{}_{1-v}$Cd$\text{}_{v}$Se:Fe, Hg$\text{}_{1-x}$Zn$\text{}_{x}$Se:Fe, HgSe$\text{}_{1-x}$Te$\text{}_{x}$:Fe and HgSe$\text{}_{1-x}$S$\text{}_{x}$:Fe are described. In particular, the dependence of the position of the Fe resonant donor state in the band structure on the crystal composition is discussed. The values of predicted Γ$\text{}_{6}$ and Γ$\text{}_{8}$ band offsets between HgSe and CdSe, HgTe, MnSe and ZnSe are given. The considerable attention is paid to the discussion of the mechanism limiting the electron mobility in the mixed alloys. Finally, topics which have not been explicitly covered in this review are mentioned and open problems are discussed.
Źródło:: Acta Physica Polonica A; 1996, 89, 1; 3-36
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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