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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. |
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Title |
Submillimeter spectroscopy of semiconductors |
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Journal Article |
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Year |
1973 |
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Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
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Volume |
37 |
Issue |
2 |
Pages |
299-304 |
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Keywords |
semiconductors, submillimeter spectroscopy, spectrometer, BWO, Ge, free excitons |
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Abstract |
The possibility is considered of carrying out submillimeter-wave spectral investigations of semiconductors by means of a high resolution spectrometer with backward-wave tubes. Results of a study of the excitation spectra of small impurities, D-(A +) centers and free excitons in germanium are presented. |
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1735 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsyna, N. G. |
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Title |
Capture of photoexcited carriers by shallow impurity centers in germanium |
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Journal Article |
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Year |
1979 |
Publication |
Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
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Volume |
50 |
Issue |
4 |
Pages |
728-734 |
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Keywords |
Ge, photoexcited carriers, shallow impurity centers |
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Measurements were made of the lifetimes rf of free carriers and the relaxation time 7, of the submillimeter impurity photoconductivity when carriers are captured by attracting shallow donors and acceptom in Ge. It is nod that in samples with capture-center concentration N,Z 10"cm-' the relaxation time 7, greatly exceeds rf in the temperature range 4.2-12 K. The measured values of 7,- are compared with the calculation of cascade recombination by the classical model. To evaluate the data on T,, the distinguishing features of this model are considered for the nonstationary case. The substantial difference betweea the values of rf and T, is attributed to re-emission of the carriers from the excited states of the shallow impurities. |
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1720 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsina, N. G. |
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Title |
Kinetics of electron and hole binding into excitons in germanium |
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Journal Article |
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Year |
1983 |
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Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
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Volume |
57 |
Issue |
2 |
Pages |
369-376 |
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Keywords |
Ge, electron and hole binding |
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The kinetics of binding of free carriers'into excitons under stationary and nonstationary conditions is studied by investigating the submillimeter photoconductivity of Ge in a wide range of temperatures and of excitation levels. It is shown that the absolute values and the temperature dependence of the binding cross section (o- T-'.' ) can be satisfactorily described by the cascade recombination theory. The value of o and its temperature dependence differ significantly from the cross sections, measured in the same manner, for capture by attracting small impurities. Under nonstationary conditions, just as in the case of recombination with shallow impurities, a signifi- cant role is played by the sticking of the carriers in highly excited states. |
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1711 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsina, N. G. |
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Title |
Cross section for binding of free carriers into excitons in germanium |
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Journal Article |
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Year |
1981 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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Volume |
33 |
Issue |
11 |
Pages |
574 |
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Keywords |
Ge, excitons, photoconductivity |
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1718 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Mel'nikov, A. P. |
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Title |
Binding energy of a carrier with a neutral impurity atom in germanium and in silicon |
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1971 |
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JETP Lett. |
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JETP Lett. |
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14 |
Issue |
5 |
Pages |
185-186 |
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Ge, Si, neutral impurity atom, binding energy |
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1739 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D. |
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Title |
Measurement of the energy gap in the compound YBaCu3O9-δ on the basis of the IR absorption spectrum |
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Journal Article |
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Year |
1987 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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Volume |
46 |
Issue |
5 |
Pages |
237-238 |
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Keywords |
YBCO HTS detectors |
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For the first time the long-wave infrared absorption spectrum has been measured by means of the bolometric effect and energy gap for high-temperature superconducting ceramics YBa/sub 2/Cu/sub 3/O/sub 9-delta/ has been determined from absorption threshold. 2delta/kT/sub c/ value is equal to 0.6. |
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1703 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Kagane, M. L. |
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Title |
Energy spectrum of acceptors in germanium and its response to a magnetic field |
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Journal Article |
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Year |
1977 |
Publication |
Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
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Volume |
45 |
Issue |
4 |
Pages |
769-776 |
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Keywords |
p-Ge, photoconductivity, energy spectrum, magnetic field |
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We investigated the spectrum of the submillimeter photoconductivity of p-Ge at helium temperatures and the effects of a magnetic field up to 40 kOe on the spectrum. A large number of lines of transitions between the excited states of the acceptors was observed, some of the lines were identified, and the energies of a number of spectral levels B, Al, Ga, In, and TI in Ge were identified. The results are compared with calculations and with experimental data obtained from the spectra of the photoexcitation of the ground state of the impurities. Using one transition as an example, we discuss the splitting of the excited states of acceptors in the magnetic field and under uniaxial compression. |
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1727 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Emtsev, V. V.; Mashovets, T. V.; Ptitsyna, N. G.; Ryvkin, S. M. |
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Title |
Role of impurities of groups III and V in the formation of defects following γ irradiation of germanium |
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Year |
1971 |
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JETP Lett. |
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JETP Lett. |
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Volume |
14 |
Issue |
6 |
Pages |
241 |
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Ge, gamma irradiation, defects, impurities |
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1742 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Elant'ev, A. I. |
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Title |
Energy spectrum of the donors in GaAs and Ge and its reaction to a magnetic field |
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Journal Article |
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Year |
1977 |
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Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
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Volume |
45 |
Issue |
3 |
Pages |
555-565 |
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Keywords |
Ge, GaAs, magnetic field, donors, energy spectrum |
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The spectrum of the submillimeter photoconductivity of n-GaAs and n-Ge in a magnetic field up to 60 kOe at helium temperatures was investigated. A large number of lines due to transitions between excited states of the donors have been investigated, and the measurement results were used to determine a number of levels of the energy spectrum in a wide range of magnetic fields. For GaAs, these data are compared with calculations of the energy spectrum of the hydrogen atom in magnetic fields up to -2X lo9 Oe. For the donors in Ge, the energy spectrum is investigated at different orientations of the magnetic field relative to the crystallographic axes (H 11 [loo], [I 1 I], [110]), and these results are also compared with the corresponding calculations. |
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1728 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
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Title |
Transitions of electrons between excited states of donors in germanium |
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Year |
1971 |
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JETP Lett. |
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JETP Lett. |
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Volume |
14 |
Issue |
2 |
Pages |
63-65 |
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Keywords |
Ge, donors, excited states |
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1740 |
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