# Browse by Subject "Physics, Condensed Matter"

• (1994)
Based on Richard P. Feynman's formulation of quantum mechanics, Path Integral Monte Carlo is a computational ab-initio method to calculate finite temperature equilibrium properties of quantum many-body systems. As input, ...

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• (1990)
We study two representative problems related to the dynamics of pattern formation in non-linear, dissipative systems far from equilibrium. The first problem addresses the dynamical mechanism of velocity and shape selection ...

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• (1990)
The quaternary material aluminum gallium indium prosphide (($\rm Al\sb{x}Ga\sb{1-x})\sb{y}In\sb{1-y}P$) is used in the fabrication of visible lasers and light emitting diodes. There are problems in this material related ...

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• (1990)
Data are presented demonstrating that the control of the edge-to-edge resonator Q across a cleaved rectangular sample is essential in identifying unambiguously photopumped phonon-assisted laser operation of Al$\sb{\rm ... application/pdf PDF (2Mb) • (1989) The III-V compound semiconductor materials are used in a wide variety of electronic, optoelectronic and microwave device applications. Temperature dependent photo-Hall effect measurements have been made on the high purity ... application/pdf PDF (5Mb) • (1995) The techniques of phonon imaging are used in conjunction with photoluminescence measurements to determine the characteristics of optically generated phonon sources in Si, Ge and GaAs at 1.7K. Focused-laser excitation of a ... application/pdf PDF (6Mb) • (1996) Several experimental surface science techniques, such as photoelectron diffraction (PED), photoemission extended fine structure (PEFS), and photoelectron holography (PEH), rely upon the measurement of the interference due ... application/pdf PDF (6Mb) • (1990) A number of different metal layer structures have been examined using angle-resolved photoemission and scanning tunneling microscopy. In the past, research pertaining to electronic properties of quantum wells, interfaces, ... application/pdf PDF (4Mb) • (1990) The clean and reacted surfaces of Si(111)-(7x7), Si(100)-(2x1), Ge(111)-c(2x8), and Ge(100)-(2x1) have been studied to better understand the nature of these elemental-semiconductor surfaces. By carefully monitoring the ... application/pdf PDF (6Mb) • (1974) application/pdf PDF (3Mb) • (1974) application/pdf PDF (6Mb) • (1970) application/pdf PDF (3Mb) • (1994) This thesis discusses carrier dynamics of III-V semiconductor quantum well structures probed by photoluminescence techniques in In$\sb{\rm x}$Ga$\sb{\rm 1-x}$As/GaAs and Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As/GaAs quantum well ... application/pdf PDF (5Mb) • (1990) Photoluminescence (PL) studies of defect-related processes in high-purity GaAs and related III-V compounds, are reported. A new effect of light-induced reactivation (LIR) or acceptors in p-type hydrogenated GaAs has been ... application/pdf PDF (8Mb) • (1974) application/pdf PDF (5Mb) • (1995) We have used a dc SQUID (Superconducting Quantum Interference Device) to study vortex-antivortex pair creation in both two-dimensional superconducting films and Josephson junction arrays in the presence of 850 nm light ... application/pdf PDF (3Mb) • (1996) We discuss the physics of systems under extreme conditions, encompassing isolated atoms in very strong magnetic fields and the behavior of the electron gas near its crystallization point. For the atoms we consider a range ... application/pdf PDF (5Mb) • (1965) application/pdf PDF (2Mb) • (1994) In this thesis, we study the problem of spin and charge separation in condensed matter. We focus primarily on Mott insulators at half-filling. It is known that one dimensional strongly correlated electronic systems display ... application/pdf PDF (7Mb) • (1994) The high T$\sb{\rm c}$superconducting oxide Bi$\sb2$Sr$\sb2$CaCu$\sb2$O$\sb{\rm x}\$ (Bi2212) is very promising for the magnet and device applications.

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