2022 International Conference on Solid State Devices and Materials

講演情報

Oral Presentation

08: Low Dimensional Devices and Materials

[H-6] Growth and Synthesis: Low Dimensional Devices and Materials

2022年9月28日(水) 13:30 〜 15:00 302 (3F)

Session Chair: Reina Kaji (Hokkaido Univ.), Shengnan Wang (NTT Basic Research Laboratories)

14:45 〜 15:00

[H-6-05] Electromigration at nanocontacts of metal species of high-melting temperatures

〇Yue Tian1, Shaoqing Du1,2, Kazuhiko Hirakawa1,3 (1. Inst. of Indus Sci., Univ. of Tokyo (Japan), 2. Shanghai inst. of microsystem and info. Tech. (China), 3. Inst. for Quantum Info. Electronics, Univ. of Tokyo (Japan))

Presentation style: Online

https://doi.org/10.7567/SSDM.2022.H-6-05

We have investigated elementary processes of electromi-gration (EM) at Ni nanocontacts and observed that they are very different from those for Au nanocontacts. The critical voltage for EM, where metal atoms are removed by electri-cal stress, show a value determined by the surface diffusion potential of the metal and they do not show a dependence expected for Joule heating. We propose a model thata a very small fraction of electrons fly ballistically over the nanocontact region and transfer their kinetic energy to met-al atoms. The proposed model reasonably explains the lat-tice temperature dependence.

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