| Autor: |
Abdul-Jabbar, NM, Ercius, P, Gronsky, R, Bourret-Courchesne, ED, Wirth, BD |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Zdroj: |
Abdul-Jabbar, NM; Ercius, P; Gronsky, R; Bourret-Courchesne, ED; & Wirth, BD. (2014). Probing the local environment of two-dimensional ordered vacancy structures in Ga2SeTe2via aberration-corrected electron microscopy. Applied Physics Letters, 104(5). doi: 10.1063/1.4863974. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/09t4s10v |
| Popis: |
There has been considerable interest in chalcogenide alloys with high concentrations of native vacancies that lead to properties desirable for thermoelectric and phase-change materials. Recently, vacancy ordering has been identified as the mechanism for metal-insulator transitions observed in GeSb2Te4and an unexpectedly low thermal conductivity in Ga2Te3. Here, we report the direct observation of vacancy ordering in Ga2SeTe2utilizing aberration-corrected electron microscopy. Images reveal a cation-anion dumbbell inversion associated with the accommodation of vacancy ordering across the entire crystal. The result is a striking example of the interplay between native defects and local structure. © 2014 AIP Publishing LLC. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
