Investigation on the phase-transition-induced hysteresis in the thermal transport along the c-axis of MoTe2
Thermal conductivity: in a loop The thermal conductivity across stacked MoTe2 layers exhibits a hysteresis loop, as the temperature changes. Similar effects in other materials have been exploited for the implementation of thermal memories for the storage of phononic information. Now, a team from Nan...
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| Autores principales: | , , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Nature Portfolio
2017
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/62326080098a4355bd1bab0f30a247d4 |
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| Sumario: | Thermal conductivity: in a loop The thermal conductivity across stacked MoTe2 layers exhibits a hysteresis loop, as the temperature changes. Similar effects in other materials have been exploited for the implementation of thermal memories for the storage of phononic information. Now, a team from Nanjing University in China studies the thermal properties along the perpendicular axis of stacked layers of MoTe2, a 2D material that undergoes a well-known structural phase transition around 250 K. The authors report an abrupt jump in the thermal conductivity around that temperature. The conductivity measured at 255 K during warming is about 10% higher than upon cooling, a hysteretic behavior dominated by phonons. With a performance comparable to other phase-change materials, MoTe2 is a very promising candidate for the implementation of all-phononic thermal memories, working at 255 K with the thermal information being “written/erased” by adjusting the temperature. |
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