Recently,all-optical memory and optical-computation properties of phase-change materials are receiving intensive attention.Because writing/erasing information in these devices is usually achieved by laser pulses,the i...Recently,all-optical memory and optical-computation properties of phase-change materials are receiving intensive attention.Because writing/erasing information in these devices is usually achieved by laser pulses,the interaction between the laser and the phase-change materials becomes a key issue for such new applications.In this work,by a time-dependent density-functional theory molecular-dynamics study,the physics underlying the optical excitation induced amorphization of Sc-Sb-Te is revealed,which goes back to superatom-like Sc-centered structural motifs.These motifs are found to be still robust under the excitation.展开更多
基金Work in China was supported by the National Natural Science Foundation of China(No.61922035,No.11904118,No.11874171)S.B.Z.was supported by the Department of Energy under Grant No.DE-SC0002623J.B.was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF-2018R1D1A1B07044564).
文摘Recently,all-optical memory and optical-computation properties of phase-change materials are receiving intensive attention.Because writing/erasing information in these devices is usually achieved by laser pulses,the interaction between the laser and the phase-change materials becomes a key issue for such new applications.In this work,by a time-dependent density-functional theory molecular-dynamics study,the physics underlying the optical excitation induced amorphization of Sc-Sb-Te is revealed,which goes back to superatom-like Sc-centered structural motifs.These motifs are found to be still robust under the excitation.
