Discovery of eddy electric fields could impact quantum computing

A new eddy electric field that has the potential to power future electronic, magnetic and optical devices has been observed by researchers at the City University of Hong Kong (CityUHK) and local partners.

The study, “Polar and quasicrystalline vortices observed in twisted bilayer molybdenum disulfide,” published in the journal Science, is of great value as it can upgrade the operation of many devices, including enhancing memory stability and computational speed. There is.

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With further research, the discovery of eddy electric fields could also impact the fields of quantum computing, spintronics, and nanotechnology.

“Until now, producing eddy electric fields has required expensive thin film deposition techniques and complex procedures. However, our research shows that this eddy electric field can be easily generated by simply twisting a two-layer, two-dimensional material. It has been demonstrated that it can be induced to Specializes in chemistry and is a core member of CityUHK’s Super Diamond and Advanced Film Center.

To achieve a clean interface, researchers typically synthesized bilayers directly. However, it is difficult to maintain twist angle freedom, especially for low-angle twists. Professor Lee’s team has invented an innovative ice-assisted transfer technique. She explains that this technique is crucial for achieving clean interfaces between bilayers and allowing the researchers to freely manipulate and create twisted bilayers.

Unlike previous studies that focused on torsion angles below 3 degrees, this team’s technique utilizes both synthesis and artificial stacking via ice-assisted transfer to achieve a wide range of torsion angles ranging from 0 to 60 degrees. I was able to create a twist angle.

Versatile uses

The discovery of new eddy electric fields in twisted bilayers could also create 2D quasicrystals, potentially enhancing future electronic, magnetic, and optical devices. Quasicrystals are desirable irregularly ordered structures because of their low thermal and electrical conductivity, making them ideal for high-strength surface coatings such as frying pans.

According to Professor Ly, this structure is expected to have a wide range of applications because the eddy electric field generated differs depending on the twist angle. Quasicrystals could lead to more stable memory effects in electronic devices, ultrafast mobilities and speeds in computing, dissipation-free polarization switching, new polarizable optical effects, and advances in spintronics.

discovery of new technology

The research team overcame many difficulties in the process of making new observations. First, we needed to find a way to establish a clean interface between the bilayers. This led to the discovery of a new technique for using ice as a transfer material, a first in this field.

By using thin sheets of ice to synthesize and transfer 2D materials, the team achieved a clean interface that was easy to navigate. Compared to other techniques, this ice-based transfer technique is more effective, less time-consuming, and cost-effective.

Then the challenge of analyzing the material had to be overcome. They ultimately achieved this discovery through the use of four-dimensional transmission electron microscopy (4D-TEM) and collaboration with other researchers. In one of many test steps, twisted bilayer 2D structures were created and new eddy electric fields were observed.

Looking to the future

Given the wide range of applications of torsion angles, the team looks forward to developing research based on new observations and continuing to explore its full potential.

The next steps in the research will focus on further manipulation of the material, such as testing whether it is possible to stack more layers and see if the same effect can be produced from other materials. I’ll guess.

The patented ice-based transfer technology enables clean bilayer interfaces to be achieved without the need for large-scale and expensive procedures, and the team is using the technology to be used by others worldwide. We look forward to seeing if any discoveries are made.

“This study had the potential to ignite a new field focused on twisted vortex fields in nanotechnology and quantum technology,” Professor Lee concluded, adding that the discovery is still at an early stage in terms of applications. However, he emphasized that it has the potential to bring about major changes. In device applications such as memory, quantum computing, spintronics, and sensing devices.