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Studies relating to cyclotron emission from semiconductors
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dc.contributor.advisor | Stradling, R. A. | |
dc.contributor.author | Cowan, David A. | |
dc.coverage.spatial | 120 p. | en_US |
dc.date.accessioned | 2018-06-27T13:42:10Z | |
dc.date.available | 2018-06-27T13:42:10Z | |
dc.date.issued | 1985 | |
dc.identifier.uri | https://hdl.handle.net/10023/14664 | |
dc.description.abstract | In this thesis studies relating to cyclotron emission in GaAs, InSb, InP and CdₓHg₁- ₓTe (C.M.T.) are described. The effect of the electric field bias on the emission intensity and linewidth in GaAs and InP is studied and a theoretical model is proposed. The study indicates the importance of nonparabolicity and polar mode scattering in determining the intensity and linewidth in these materials. Inter-excited state transitions are observed for the first time in emission- Nonparabolicity splitting is observed in InP and that in GaAs, originally observed in by Gornik (1983),is confirmed. The application of hydrostatic pressure to InSb is observed to narrow the emission line by a factor of three. In experiments on the magnetoimpurity effect in GaAs transitions between the 1S and 2P_, 2P₀, 3D-₂ and 3D-₁ impurity states are observed and central cell structure is observed for the first time. In bulk C.M.T. cyclotron resonance is studied as a function of hydrostatic pressure and reasonable agreement is achieved with accepted values for the variation of band gap with pressure. In the surface layer cyclotron resonance is observed as are Shubnikov de Haas oscillations and electric subband energies are calculated for each of these experiments. Finally the use of cyclotron emission as a spectroscopic source is demonstrated and future developments discussed. | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of St Andrews | |
dc.subject.lcc | QC612.S4C7 | |
dc.subject.lcsh | Semiconductors. | en |
dc.title | Studies relating to cyclotron emission from semiconductors | en_US |
dc.type | Thesis | en_US |
dc.contributor.sponsor | Science and Engineering Research Council (SERC) | en_US |
dc.type.qualificationlevel | Doctoral | en_US |
dc.type.qualificationname | PhD Doctor of Philosophy | en_US |
dc.publisher.institution | The University of St Andrews | en_US |
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