Oscillatory Magnetoabsorption in InSb Under High Resolution

Zwerdling, S.; Kleiner, W. H.; Theriault, J. P.

doi:10.1063/1.1777027

Cited by 62 publications

(5 citation statements)

References 10 publications

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“…4 indicates that the energy gap has a value close to 0.234 eV as compared to the value (0.2357±0.0005) eV deduced by extrapolation in the analysis of magnetoabsorption data. 18 The above interpretation leads us to expect a narrowing of the emission line with decreasing intensity of excitation. In fact, a narrowing by 1 meV was observed in a p-typz sample when the intensity of exciting light was reduced by a factor of 4.…”

Section: A Intrinsic Emissionmentioning

confidence: 95%

“…The expression applies under the condition a'LS>l which is valid for our measurements with a'^lO 4 cm" 1 and Z-10~3 cm. Substituting (19) in (18) and using the condition a'L^>\, we get…”

Section: Correction For Self-absorptionmentioning

confidence: 99%

“…AG=(e/l 2 )»N, (18) where I is the sample length and y. is the electron mobility. The contribution of holes to AG may be neglected because of their comparatively low mobility.…”

Section: Dependence On the Intensity Of Excitationmentioning

confidence: 99%

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Recombination Emission in InSb

1966

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Optically excited recombination emission has been studied for n-and p-type single-crystal samples of InSb at 77 and 4.2°K. Emissions associated with band-to-band transitions, transitions with creation of an optical phonon, and transitions involving acceptor impurities have been observed. The band-to-band emission in the pure samples can be attributed to direct transitions, whereas the emission in samples of high donor concentrations clearly shows transitions violating wave-vector conservation. The emission of phononassisted transitions is about 150 times weaker than that of direct transitions; this ratio is consistent with the strength of polar-mode coupling. The »-type as well as the p-type samples show an emission band due to electron transitions from the conduction band to some impurity level at 7.5 meV above the valence band, and the emission is much more prominent in the Zn-doped samples. Germanium-doped p-type samples show a weak emission band associated with an acceptor level at 17 meV above the valence band. Samples of large donor concentrations show the effect of band tailing. The main impurity emission increases linearly while the band-to-band emission increased quadratically with the intensity of exciting light. From the shift and splitting of the emission under applied magnetic field, an electron effective mass of w e M).018m and an electron g factor of | g | = 40 at 30 kG are obtained. Electroluminescence has been observed in />-type crystals under pulsed electric fields of ^60 V/cm. The observed spectrum appears to be a broadened impurity line. The emission is more than an order of magnitude weaker than optically excited emission corresponding to the same sample conductance. 5 R.

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Section: A Intrinsic Emissionmentioning

confidence: 95%

“…The expression applies under the condition a'LS>l which is valid for our measurements with a'^lO 4 cm" 1 and Z-10~3 cm. Substituting (19) in (18) and using the condition a'L^>\, we get…”

Section: Correction For Self-absorptionmentioning

confidence: 99%

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Recombination Emission in InSb

1966

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“…Now one can obtain more precise band parameters from the interband magnetoabsorption spectra of these materials than those obtained previously by neglecting exciton energy shifts 1 ' 2 or by using theoretical estimates. 3 Excitons can be expected to add complications to the analysis of the polaron effects previously observed in the interband magnetoabsorption of InSb, 4 > 5 and a good knowledge of the role of excitons should contribute to the understanding of the polaron observations. The exciton problem in the interband magnetoabsorption of these materials is essentially that of a hydrogen atom in a high magnetic field, which is is a problem of long-standing theoretical interest.…”

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confidence: 99%

Observation of Exciton Fine Structure in the Interband Magnetoabsorption of InSb and Germanium

Johnson

1967

Phys. Rev. Lett.

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“…1(b) show sizable absorption for photon energies significantly smaller than E G . 9 Also, d 14 is complex, indicating some sort of resonant behavior below the band gap. A possible explanation may lie in the consideration of excitonic effects which have recently been shown to be of importance for X (2) (CuCl).…”

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confidence: 99%

Dispersion of the Lowest-Order Optical Nonlinearity in InSb

Wynne

1971

Phys. Rev. Lett.

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remains the same.After mechanically damaging a sample we also observe a shift of the peak to larger fields. Just as in the irradiation experiments, the temperature dependence shows an increase in the intercept A without a change in B.(8) Other metals. -Experiments in Bi, Ga, and K would seem to fit the Cu story, and we suggest that the effects observed in Refs. 3-5 are due to the same mechanism. We have examined such data to find that Eq. (4) also gives reasonable agreement with observed field values.In conclusion, we would like to acknowledge the many useful discussions we have had with E. A. Kaner, H. J. Fischbeck, A. B. Pippard, and M. Ya. Azbel\ In particular, M. Ya. Azbel' has pointed out to us that the contribution to dZ/dH of surface electrons should diverge as Second-harmonic generation (SHG) has been directly measured in InSb as a function of photon energy for second-harmonic (SH) photon energies near the fundamental band-gap energy. The ex-

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Oscillatory Magnetoabsorption in InSb Under High Resolution

Cited by 62 publications

References 10 publications

Recombination Emission in InSb

Recombination Emission in InSb

Observation of Exciton Fine Structure in the Interband Magnetoabsorption of InSb and Germanium

Dispersion of the Lowest-Order Optical Nonlinearity in InSb

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