# Browse by Subject "Physics, Condensed Matter"

• (1994)
The universal behavior of insulating glasses at low temperature, compatible with but not explained by the tunnelling two level (TLS) model is reviewed. Recent non-equilibrium dielectric experiments on the capacitance of ...

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• (1993)
In this thesis, the significance and the range of applicability of the classical concepts of capacitance and resistance to semiconductor nanostructures are investigated. In particular, the combination law for the conductances ...

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• (1991)
Data are presented on Al$\sb{\rm y}$Ga$\sb{\rm 1-y}$As-GaAs-In$\sb{\rm x}$Ga$\sb{\rm 1-x}$As quantum well heterostructure diode lasers showing that the large band filling range of a combined GaAs-In$\sb{\rm x}$Ga$\sb{\rm ... application/pdf PDF (4MB) • (1966) application/pdf PDF (4MB) • (1974) application/pdf PDF (4MB) • (2009) Ion implantation is widely used in the microelectronics industry for fabrication of source and drain transistor regions. Unfortunately, implantation causes considerable damage to the substrate lattice rendering most of the ... application/pdf PDF (8MB) • (1999) Photoluminescence was used to measure the bandgap of GaN as a function of temperature in the range 2--811 K, and the results were fitted to Varshni's empirical formula to obtain an expression for the dependence of the ... application/pdf PDF (4MB) • (1981) The performance in a cw optically pumped far infrared (fir) laser of a hybrid metal mesh-dielectric mirror consisting of an assembly of thin metallic and semiconducting films is evaluated. Its construction is described and ... application/pdf PDF (4MB) • (1994) In this thesis the electronic and optical properties of confined and unconfined excitons in semiconductor quantum heterostructures are investigated. We use multiband effective mass theory to solve the subband structure in ... application/pdf PDF (3MB) • (1990) In this thesis we investigate the optical properties of modulation doped GaAs/AlGaAs and strained-layer undoped InGaAs/GaAs multiple quantum well structures (MQWS). The phenomena studied are the effects of carrier, strain, ... application/pdf PDF (4MB) • (1966) application/pdf PDF (4MB) • (1992) This thesis presents theoretical investigations of the subband structure and optical properties of semiconductor quantum wires. For the subband structure, we employ multiband effective-mass theory and the effective ... application/pdf PDF (5MB) • (1974) application/pdf PDF (4MB) • (1968) application/pdf PDF (2MB) • (2008) In this thesis we develop innovative optimization models for phasing crystal structures from X-ray diffraction data. First, an integer minimal principle for quartets and triplets is proposed for initially setting the phases ... application/pdf PDF (2MB) • (2000) In the third and final part of the thesis, a new technique based on Green!s function method is proposed to identify the dynamics of practical bolted joints. By modeling the difference between the dynamics of the bolted ... application/pdf PDF (6MB) • (1992) Optical emission spectra from the np$\sp5$initial core-excited configurations of the alkaline-earth metals calcium, strontium, and barium are presented. The spectra are found to be anomalously broad and red-shifted with ... application/pdf PDF (5MB) • (1979) application/pdf PDF (5MB) • (1993) A series of oxide superconductors and related compounds, including: BaPbO$\sb3,$BaBiO$\sb3,$BaSb$\sb{0.25}$Pb$\sb{0.75}$O$\sb3,$BaBi$\sb{0.25}$Pb$\sb{0.75}$O$\sb3,$Ba$\sb{0.6}$K$\sb{0.4}$BiO$\sb3,$Bi$\sb2$Sr$\sb2$CuO$\sb{\rm ...

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• (1990)
In this study, solid state nuclear magnetic resonance (NMR) spectroscopy is used to investigate the structural, electronic, and dynamical properties of a variety of high temperature oxide superconductors and metal carbonyls ...

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