期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 31, 页码 37353-37369出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c09070
关键词
phase-change materials; Ga-Te binaries; nanotectonic compression; first-principles simulations; X-ray diffraction; Raman spectroscopy; optical and electronic properties
资金
- Ministry of Science and Higher Education [075-15-2019-1950]
- Office of Basic Energy Sciences, US Department of Energy [DE-AC02-06CH1135]
Research reveals that the phase change in binary Ga-Te is characterized by a very unusual nanotectonic compression with high internal transition pressure, which is beneficial for PCM applications by increasing optical and electrical contrast between the SET and RESET states and reducing power consumption. Using high-energy X-ray diffraction and Raman spectroscopy, the short- and intermediate-range order in bulk GaxTe1-x, 0.17 <= x <= 0.25, is elucidated in terms of their thermal, electric, and optical properties.
Binary Ge-Te and ternary Ge-Sb-Te systems belong to flagship phase-change materials (PCMs) and are used in nonvolatile memory applications and neuromorphic computing. The working temperatures of these PCMs are limited by low-T glass transition and crystallization phenomena. Promising high-T PCMs may include gallium tellurides; however, the atomic structure and transformation processes for amorphous Ga-Te binaries are simply missing. Using high-energy X-ray diffraction and Raman spectroscopy supported by first-principles simulations, we elucidate the short- and intermediate-range order in bulk glassy GaxTe1-x, 0.17 <= x <= 0.25, following their thermal, electric, and optical properties, revealing a semiconductor-metal transition above melting. We also show that a phase change in binary Ga-Te is characterized by a very unusual nanotectonic compression with the high internal transition pressure reaching 4-8 GPa, which appears to be beneficial for PCM applications increasing optical and electrical contrast between the SET and RESET states and decreasing power consumption.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据