Two-dimensional ラーメンベット 退会 have a chance to galvanize significant advances in electronic device capabilities, replacing silicon-based chips. However, many problems continue to hold back these devices.
A major problem is carrier mobility, or how fast electrons can move through the ラーメンベット 退会. These 2D ラーメンベット 退会 are notoriously slow in this area, limiting the ability for improvements and real-world applications.
Researchers at The University of Texas at Austin have discovered more than a dozen different materials for 2D ラーメンベット 退会 that could allow electrons to quickly move around, which opens the door for a leap in electronics' capabilities.
"If you can replace silicon with 2D ラーメンベット 退会 that will lead to faster devices that consume significantly less energy," said Yuanyue Liu, an assistant professor in the ラーメンベット 禁止ゲーム of Engineering's Walker Department of Mechanical Engineering and Texas Materials Institute, who leads the project.
The research was recently published in Physical Review Letters.
The big difference between traditional silicon-based ラーメンベット 退会 and 2D ラーメンベット 退会 is their geometry. The 2D ラーメンベット 退会 are much thinner, only a couple of atomic layers thick. This is advantageous in many ways as the push to make ラーメンベット 退会 smaller continues to pick up steam.
The compact nature of 2D ラーメンベット 退会 creates problems as well. The electrons are packed in tight, without much freedom to move. Scattering sources can more easily knock them off track in these smaller spaces, which is why carrier mobility is generally low in 2D ラーメンベット 退会, preventing improved power and efficiency.
The 14 ラーメンベット 退会 discovered by the researchers with high carrier mobility are an exception to this problem. Unique properties among these ラーメンベット 退会 make the electrons more transparent, rendering them essentially invisible to scatterings and allowing the electrons to stay on course.
To find these ラーメンベット 退会, the researchers used an existing ラーメンベット 退会 database and a checklist of characteristics that they hypothesized would lead to improved mobility. They then used quantum-mechanical method to accurately calculate the carrier mobility in the ラーメンベット 退会.
"The fact that we only found 14 materials with potentially high carrier mobility out of thousands does not contradict the conventional wisdom," Liu said. "It shows how difficult it is to find 2D ラーメンベット 退会 with high carrier mobility."
The next step, Liu says, is to partner with experimental researchers and work on fabricating ラーメンベット 退会 to test and verify their findings. Though Liu is confident in the findings, he cautioned that they are still theoretical and will need to be confirmed by real-world testing.
Other team members on the project include Chenmu Zhang, Ruoyu Wang and Himani Mishra, all from the Walker Department of Mechanical Engineering and the Texas ラーメンベット 退会 Institute.
This research is supported by Welch Foundation and NASA and used computational resourced provided by TACC, ACCESS, and NREL.
