Rie Kojima

TL;DR: These structures suggest a bond-interchange model, where a sequence of small displacements of Sb atoms accompanied by interchanges of short and long bonds is the origin of the rapid crystallization of a-AIST, which differs profoundly from crystallization in a-GST.

TL;DR: In this paper, the thermal properties of the amorphous and crystalline state of phase-change materials are investigated and it is shown that higher thermal displacements and a more pronounced anharmonic behavior in the crystalline phase are related to the change of bonding upon crystallization, which leads to an increase of the sound velocity and a softening of the optical phonon modes at the same time.

TL;DR: In this paper, the nitrogen doping effect on the Ge-Sb-Te recording layer was quantitatively examined and it was found that the most suitable nitrogen concentration was from 2 to 3 at%.

TL;DR: In this paper, the feasibility of using a rewritable dual-layer phase-change optical disk utilizing a blue-violet laser was demonstrated for the first time, and a very thin recording layer with a new phase change material Ge-Sn-Sb-Te and a 10-nm-thick silver-alloy reflective layer was adopted to obtain a large transmittance and high-quality signals.

TL;DR: In this paper, the authors investigated the valence-band density of states and core levels of amorphous and crystalline pseudobinary compounds using hard x-ray photoemission spectroscopy.