Experimental Investigation of the Electronic Properties of Solids.
Abstract
The report summarizes research results in abstract form. It contains a list of published papers. Several new methods have been developed and employed during the tenure of this contract. (1) The attenuation and velocities of circularly polarized ultrasonic shear waves in a magnetic field was measured in Al, Sn, and Sb at 4 degrees K. Doppler shifted cyclotron resonance and geometric resonance were interpreted. 9The symmetry breaking effect of shear stress was used in studying the a.c. modulation piezoreflectance in Cu; deformation potentials and pseudopotential parameters were determined. (2) Controlled amounts of paramagnetic impurities were added to the insulator of tunnel junctions to study zero bias tunneling anomalies associated with magnetic impurity interactions. The conditions for the occurrence of giant resistance and of conductance anomalies were elucidated. Bias dependent structure in the noise spectrum of Schottky barrier tunnel diodes was discovered. (3) Synchrotron radiation of a 240 MeV electron storage ring (Stoughton, Wisconsin) was used to measure the reflectance of 20 alkali halide and oxide crystals between 90-450K and 6 < h nu < 36 eV. (4) Electronic, photovoltaic, optical properties and electron spin resonance of amorphous semiconductors were studied. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- AD0720272
Entities
People
- H. Fritzsche
Organizations
- University of Chicago