# Browse by Subject "Physics, Condensed Matter"

• (1996)
We have investigated the influence of zinc doping on the Hall effect in detwinned and twinned single crystals of $\rm YBa\sb2Cu\sb3O\sb{7-\delta}$. We observed the sign reversal of the Hall effect for crystals with ...

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• (1992)
We measured the Hall effect in untwinned single-crystal YBa$\sb2$Cu$\sb3$O$\sb{\rm 7-y}$, a high-T$\sb{\rm c}$ superconductor. The crystals were grown using a technique that we invented, in which untwinned domains are ...

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• (1990)
High-resolution ac heat capacity measurements of YBa$\sb2$Cu$\sb3$O$\sb{\rm 7-\delta}$ near the critical temperature are reported and discussed. The samples are high-quality single crystals, several of which display untwinned ...

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• (1990)
Single crystal superlattices of heavy rare earth metals with yttrium have been synthesized by methods of molecular beam epitaxy developed in this thesis research. Studies of the growth behavior of hcp rare earth metals on ...

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• (1995)
We report measurements of the rf vortex penetration depth $\lambda$(B) of the organic compound, $\kappa$-ET$\sb2$Cu$\lbrack$N(CN)$\sb2\rbrack$Br as a function of temperature, magnetic field, and the angle made by the applied ...

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• (1967)

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• (1985)
High pressure was used to study the insulator-to-metal transition in sulfur and the thallous halides and to study the intermolecular interactions in charge-transfer complexes. The approach to the band overlap insulator-to-metal ...

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• (1966)

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• (1966)

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• (1965)

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• (1966)

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• (1991)
Low temperature propagation and detection of high frequency acoustic phonons in GaAs and InAs is studied. Phonon imaging is used to study scattering of acoustic phonons in GaAs and angular dispersion of acoustic phonons ...

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• (1990)
The continuing importance of solid state materials has prompted greater interest in the understanding of fundamental processes which occur in the solid state. Phase transitions and reactions are crucial to the properties, ...

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• (1979)

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• (1991)
The 1/f resistance fluctuations of thin Nb films was studied from 60 K to 400 K. The resistance noise came from hydrogen ions and other defects placed in the films during sputtering. Hydrogen ions cause three types of 1/f ...

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• (1961)

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• (1990)
We have used light scattering techniques to probe the vibrational properties of GaAs/AlAs superlattices and the dynamics of electrons in GaAs/Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As multiple quantum well structures.

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• (1968)

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• (1991)
The development of visible-spectrum semiconductor lasers is of immense economic and practical importance. Because of the extremely high efficiency of semiconductor lasers, coherent visible light sources can be made with ...

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• (1990)
In these experiments, impurity-induced layer disordering (IILD) utilizing the chemical reduction of SiO$\sb2$ by Al (from high-percentage Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As) is employed to produce Si and O to effect layer ...

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