Zobrazeno 1 - 10
of 62
pro vyhledávání: '"V. I. Ozhogin"'
Publikováno v:
Hyperfine Interactions. 180:1-5
We report on the first NMR study of 73Ge nuclear spin decoherence in germanium single crystals with different abundance of the 73Ge isotope. Hahn echo decays are well fit by a superposition of two exponentials. The deviation from the single exponenti
Publikováno v:
Journal of Experimental and Theoretical Physics. 101:322-330
The effect of isotopic disorder on ultrasound absorption in germanium, silicon, and diamond crystals is considered. The “giant” isotope effect is predicted in the ultrasound absorption coefficient (in contrast to the isotope effect in the thermal
Autor:
Kohei M. Itoh, A. V. Inyushkin, V. I. Ozhogin, Eugene E. Haller, I. G. Kuleev, Alexander N. Taldenkov, I. I. Kuleev
Publikováno v:
Journal of Experimental and Theoretical Physics. 96:1078-1088
A strong dependence of the thermopower of germanium crystals on the isotopic composition is experimentally found. The theory of phonon drag of electrons in semiconductors with nondegenerate statistics of current carriers is developed, which takes int
Publikováno v:
Solid State Communications. 118:1-22
We present a comprehensive Raman study of self-energy effects in isotopically tailored silicon crystals at low temperature. Changes in the measured Raman spectra induced by isotope mass disorder are analyzed, including the weak excitations on the low
Autor:
V. I. Ozhogin, A. Ananyev, A. Gerashenko, A. Trokiner, B. Z. Malkin, S. V. Verkhovskii, E. Haller, A. Yakubovskii, Yu. V. Piskunov, A. V. Tikhomirov, Semion K. Saikin
Publikováno v:
Zeitschrift für Naturforschung A. 55:105-110
NMR spectra of 73Ge (nuclear spin I = 9/2) in perfect single crystals of germanium with different isotopic content were measured at 80, 300, and 450 K. The observed specific line shapes gave evidence of the isotopic disorder, in particular, abnormal
Publikováno v:
JETP Letters. 88:458-460
The shifts of the phonon frequencies in 70Ge and 74Ge monoisotopic crystals have been studied using inelastic neutron scattering. It has been shown that the frequency shifts for all of the branches are normal, i.e., inversely proportional to √M. At
Publikováno v:
Solid State Communications. 108:895-898
Far infrared photoconductivity and absorption measurements were performed on isotopically controlled 76 Ge samples that were neutron irradiated to produce 77 Se through double beta decay. The spectra exhibit ground state to bound excited state transi
Autor:
Kohei M. Itoh, Wladek Walukiewicz, Jun'ichiro Muto, V. I. Ozhogin, John Farmer, Eugene E. Haller, Jeffrey W. Beeman, Takahiro Kinoshita
Publikováno v:
Materials Science Forum. :77-82
Autor:
Kohei M. Itoh, Manuel Cardona, E. Gmelin, V. I. Ozhogin, Alexander N. Taldenkov, A. P. Zhernov, M. Asen-Palmer, K. Bartkowski, Eugene E. Haller, A. V. Inyushkin
Publikováno v:
Physical Review B. 56:9431-9447
We have measured the thermal conductivity of seven germanium crystals with different isotopic compositions in the temperature range between 2 K and 300 K. These samples, including one made of highly enriched ${}^{70}\mathrm{Ge}(99.99%)$, show intrins
Publikováno v:
Journal of Magnetism and Magnetic Materials. 170:285-288
Non-uniform spin states (stripe domains) are induced by powerful pulse ultrasonic waves in a hematite (α-Fe 2 O 3 ) single crystal. These states are visualized with the help of the Cotton-Mouton effect and quantitatively described in terms of an eff