Výsledky vyhledávání - "Tominaga, J."

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Enhancement of Coherent Phonon Amplitude in Phase-change Materials by Near-infrared Laser Irradiation

Autor: Suzuki, T., Saito, Y., Fons, P., Kolobov, A. V., Tominaga, J., Hase, M.

Publikováno v: Appl. Phys. Lett. Vol. 111, 112101 (2017)

We have examined the effect of pump-probe photon energy on the amplitude of coherent optical phonons in a prototypical phase change material using a femtosecond time-resolved transmission technique. The photon energy was varied between 0.8 and 1.0 eV

Externí odkaz: http://arxiv.org/abs/1709.02567

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A possible mechanism of ultrafast amorphization in phase-change memory alloys: an ion slingshot from the crystalline to amorphous position

Autor: Kolobov, A. V., Mishchenko, A. S., Fons, P., Yakubenya, S. M., Tominaga, J.

Publikováno v: J. Phys.: Condens. Matter, vol. 19 (2007) 455209 (7pp)

We propose that the driving force of an ultrafast crystalline-to-amorphous transition in phase-change memory alloys are strained bonds existing in the (metastable) crystalline phase. For the prototypical example of GST, we demonstrate that upon break

Externí odkaz: http://arxiv.org/abs/0803.2127

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Raman scattering study of the a-GeTe structure and possible mechanism for the amorphous-to-crystal transition

Autor: Andrikopoulos, K. S., Yannopoulos, S. N., Voyiatzis, G. A., Kolobov, A. V., Ribes, M., Tominaga, J.

We report on an inelastic (Raman) light scattering study of the local structure of amorphous GeTe films. A detailed analysis of the temperature-reduced Raman spectra has shown that appreciable structural changes occur as a function of temperature. Th

Externí odkaz: http://arxiv.org/abs/cond-mat/0602167

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