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Feature Article - Semiconductor Superlattices with Small Band Offsets

100%

Yang G., Lewandowski L., Furdyna J., Ram-Mohan L.

Acta Physica Polonica A

1998

vol. 93

issue 4

567-600

Optical transitions in small band offset superlattices are studied within the framework of the nearly free electron approximation, in which the weak superlattice potential is treated as a perturbation. Interband selection rules are derived for transitions involving conduction and valence band states at the superlattice Brillouin zone center and the zone edge. It is found that a number of new transitions can occur in such small-offset superlattices due to wave function mixing of different subband states. The effect of the effective mass on the optical transitions is also discussed. The theory is used to explain the results observed in magneto-optical absorption experiment in ZnSe/Zn_{1-x}Mn_{x}Se small-offset superlattices. Furthermore, the nearly free electron formulation is found to be in excellent agreement with rigorous multi-band numerical calculation on superlattices involving small band offsets.

Effects of Neuromedin S on the Proliferation of Splenic Lymphocytes and the Cytokine Secretion by Pulmonary Alveolar Macrophages in Pigs in vitro

88%

Huang Y., Lin R., Wang Q., Qi B., Yang G.

Polish Journal of Veterinary Sciences

2016

issue 3

Investigation of Strain in II-VI Semiconductor Superlattices Using Electron Paramagnetic Resonance of Mn^{++}

76%

Furdyna J. K., Qazzaz M., Yang G., Montes L., Xin S. H., Luo H.

Acta Physica Polonica A

1995

vol. 88

issue 4

607-618

We explore the possibility of using electron paramagnetic resonance (EPR) of Mn^{++} for measuring uniaxial strain in II-VI superlattices. This work is motivated by the fact that the EPR spectrum of Mn^{++} is very strongly affected by crystalline fields. Changes in a crystalline field which arise from strain are thus automatically expected to have a profound effect on the EPR spectrum. Consistent with this expectation, we have observed giant crystal field splittings of Mn^{++} EPR lines in ZnTe/MnTe, CdTe/MnTe, and ZnTe/MnSe superlattices. The EPR spectra observed in these systems are ascribed to isolated Mn^{++} ions diffused into the ZnTe or the CdTe layers from the respective MnTe or MnSe layers. In addition to providing precise information oii the magnitude and the sign of strain produced by lattice mismatch between the superlattice constituents, we show that the EPR spectrum also provides a direct measure of strain fluctuations in the layered medium.

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2 Acta Physica Polonica A

1 Polish Journal of Veterinary Sciences

1 2016

1 1998

1 1995

3 Yang G.

1 Furdyna J.

1 Furdyna J. K.

1 Huang Y.

1 Lewandowski L.

1 Lin R.

1 Luo H.

1 Montes L.

1 Qazzaz M.

1 Qi B.

1 Ram-Mohan L.

1 Wang Q.

1 Xin S. H.

Search results

Feature Article - Semiconductor Superlattices with Small Band Offsets

Effects of Neuromedin S on the Proliferation of Splenic Lymphocytes and the Cytokine Secretion by Pulmonary Alveolar Macrophages in Pigs in vitro

Investigation of Strain in II-VI Semiconductor Superlattices Using Electron Paramagnetic Resonance of Mn^{++}