Pressure-induced reversal of Peierls-like distortions elicits the polyamorphic transition in GeTe and GeSe
Tomoki Fujita, Yuhan Chen, Yoshio Kono, Seiya Takahashi, Hidetaka Kasai, Davide Campi, Marco Bernasconi, Koji Ohara, Hirokatsu Yumoto, Takahisa Koyama, Hiroshi Yamazaki, Yasunori Senba, Haruhiko Ohashi, Ichiro Inoue, Yujiro Hayashi, Makina Yabashi, Eiji Nishibori, Riccardo Mazzarello, Shuai Wei · 2023
Read Pressure-induced reversal of Peierls-like distortions elicits the polyamorphic transition in GeTe and GeSe by Tomoki Fujita, Yuhan Chen, Yoshio Kono, Seiya Takahashi, Hidetaka Kasai, Davide Campi, Marco Bernasconi, Koji Ohara, Hirokatsu Yumoto, Takahisa Koyama, Hiroshi Yamazaki, Yasunori Senba, Haruhiko Ohashi, Ichiro Inoue, Yujiro Hayashi, Makina Yabashi, Eiji Nishibori, Riccardo Mazzarello, Shuai Wei (2023) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-10703813.txt.
Description
Tomoki Fujita and co-authors show that pressure can undo a key distortion in two glassy materials in a 2023 paper. The materials, germanium telluride and germanium selenide, are used in phase-change memory, where their glass and crystal states store data. Their cooled liquids carry a local warp, called a Peierls-like distortion, tied to how the glass changes form.
Using high-energy X-rays at a synchrotron and computer models with a machine-learned potential, the team watched the atomic pattern under pressure. Pressure reversed the warp and triggered a switch between two glass forms. The new state was more ordered, stiffer, and had a narrower energy gap. The authors say controlling the warp by pressure or mix could help design memory devices.
Catalog record
| CREATOR | Tomoki Fujita, Yuhan Chen, Yoshio Kono, Seiya Takahashi, Hidetaka Kasai, Davide Campi, Marco Bernasconi, Koji Ohara, Hirokatsu Yumoto, Takahisa Koyama, Hiroshi Yamazaki, Yasunori Senba, Haruhiko Ohashi, Ichiro Inoue, Yujiro Hayashi, Makina Yabashi, Eiji Nishibori, Riccardo Mazzarello, Shuai Wei |
|---|---|
| YEAR | 2023 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 59 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |