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Iron Impurity Related Optical Transitions in HgSe:Fe

100%
Szuszkiewicz W., Julien C., Balkanski M., Arciszewska M., Witkowska B., Mycielski A.
Acta Physica Polonica A
|
1991
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vol. 80
|
issue 3
437-440
EN
Fe^{2+} crystal field transitions and the heavy hole valence band to the Fe level transitions (e + Fe^{3+} → Fe^{2+}) have been observed and discussed for HgSe doped with iron.
2
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Do the Mixed Crystals HgSeS Exhibit the One-Mode Behavior?

100%
Szuszkiewicz W., Witowski A., Julien C., Balkanski M., Dybko K., Witkowska B., Mycielski A.
Acta Physica Polonica A
|
1992
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vol. 82
|
issue 5
887-889
EN
The low-temperature far-infrared reflectivity spectra of HgSe and HgSeS are measured and analysed. The results suggest the one-mode behavior of phonon excitations in HgSeS mixed crystals.
3
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Influence of Impurity Charge Correlation on Free-Carrier Absorption

100%
Szuszkiewicz W., Sobkowicz P., Witkowska B., Bardyszewski W., Julien C., Balkanski M.
Acta Physica Polonica A
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1993
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vol. 84
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issue 3
559-562
EN
Impurity-mediated free-carrier absorption was analyzed theoretically taking into account the possible spatial impurity correlations. The effect of correlations was included via the structure factor S(q) obtained from finite temperature Monte Carlo simulations of ordering in the impurity system. From the comparison of the experimental data with the results of calculations it is demonstrated that the ordering of charged centers exists for HgSe:Fe in a wide temperature range.
4
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Free-Carrier Plasmons as a Novel Tool in Semiconductor Physics

84%
Szuszkiewicz W., Bardyszewski W., Dingrong Q., Jiaming Z., Julien C., Balkanski M., Witkowska B., Mycielski A.
Acta Physica Polonica A
|
1991
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vol. 79
|
issue 1
141-144
EN
It is demonstrated that free-carrier plasmons being well defined collective excitations of the electron gas in the range of small wave vectors can serve as a sensitive tool to investigate the optical processes related to the small momentum transfers. As an example the system HgSe:Fe is analysed both experimentally and theoretically.
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