Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"trigonal symmetry"”.
-
Crystal Spectra and Optical Activity of Transition Metal Compounds With Trigonal Symmetry
Made available in DSpace on 2014-12-09T17:35:04Z (GMT). No. of bitstreams: 1 6503610.pdf: 4520079 bytes, checksum: 52d7ba6b8bf4ee0895b9c6a6e55b847d (MD5) Previous issue date: 1964
-
Low Temperature Electron Irradiation Induced Defects in Gallium-Arsenide: Bulk and Surface Acoustic Wave Studies
… The defects responsible for both peaks have trigonal symmetry and were observed in n-type and semi-insulating GaAs with bulk and surface acoustic waves (SAW) respectively. Bulk waves at eight frequencies between 9 and 130 MHz and SAW at 73 and 145 MHz were used. The reorientation kinetics of …
-
Interstitial-impurity interactions in copper-silver and aluminum-magnesium alloys
… the main one at 16 K, peak 1) were seen having trigonal symmetry. 2) Peak annealed away at 110 K uncorrelated with any resistivity recovery. 3) Peak 1 grew at 60 K, correlated with a resistivity decrease. For AI-Mg, the principal features associated with the main peak (peak 6) include: 1) Peak 6 …
-
The effect of applied uniaxial stresses on the optical absorption of F centers in alkali halides
… state to lattice distortions of tetragonal and trigonal symmetry is evaluated. By measuring the third moment change due to the same ~pplied stresses, the separate contributions to the second moment of the F band of dynamic lattice distortions of tetragonal, trigonal, and breathing symmetries are …
-
On the electronic structure of layered sodium cobalt oxides
… distorted in such a way that the resulting local symmetry is trigonal. The trigonal coordination of the Co sites results in geometric frustration which favours unconventional electronic ground states. The geometrically frustrated CoO2 sublattice also exists in the nonhydrated parent compound …
-
Low temperature electron irradiation induced defects in gallium arsenid: Bulk and surface acoustic wave studies
… The defects responsible for both peaks have trigonal symmetry and were observed in n-type and semi-insulating GaAs with bulk and surface acoustic waves (SAW) respectively.· Bulk waves at eight frequencies between 9 and 130 MHz and SAW at 73 and 145 MHz were used. The reorientation kinetics of …
-
Raman scattering studies in the isostructural family of the solid electrolyte rubidium silver iodide
… T2 (T = 208K for M-Rb). The 2 point group symmetry is cubic P4 32(06) and the crystal is l optically active. There is always a broad, structureless peak at 105 cm-1 that is strongest in Al symmetry. This suggests that the peak is due to the breathing modes of the iodine tetrahedra around …
-
High-pressure and high-temperature structural and electronic properties of (Mg,Fe)O and FeO
… does not coincide with the structural cubic-to-trigonal symmetry breaking transition in non-stoichiometric FeO. The magnetic ordering transition was determined for the first time by a combined Mössbauer spectroscopy and neutron diffraction study. A full agreement between these two methods was …
-
Quantification of collagen fiber organization in biological tissues at cellular and molecular scales using second-harmonic generation imaging
… of the wavelength of light and lack inversion symmetry, thus allowing for the process of second harmonic generation (SHG) when exposed to intense incident light. Consequently, SHG microscopy has been frequently employed in medicine and biology to obtain high-contrast 3D images of collagen …