Scientific Advances: Researchers at Tel Aviv University have designed the world’s smallest technology, with a thickness of only two atoms. According to researchers, the new technology proposes a way to store electrical information in the thinnest unit known in science, one of the most stable and inert materials in nature. Allowing quantum mechanical electron tunneling through atomic thin films could accelerate the information reading process far beyond current technology.
This study was conducted by scientists at the School of Physics and Astronomy in Raymond and Beverly Suckler and the School of Chemistry in Raymond and Beverly Suckler. This group includes Maayan Vizner Stern, Yuval Waschitz, Dr. Wei Cao, Dr. Iftach Nevo, Prof. Eran Sela, Prof. Michael Urbakh, Prof. Oded Hod, and Dr. Moshe Ben Shalom. The work is currently Science magazine.
“Our research stems from curiosity about the behavior of atoms and electrons in solid materials, which has created many technologies that support our modern lifestyle,” said Dr. Ben Shalom. say. “We (and many other scientists) try to understand, predict, and even control the fascinating properties of these particles as they condense into regular structures called crystals, for example. At the heart of the computer is a small crystalline device designed to switch between two states that respond differently (such as “yes” or “no”, “up” or “down”). Without this dichotomy, that wouldn’t be possible. Encodes and processes the information. The real challenge is to find a mechanism that allows switching on smaller, faster, and cheaper devices.
Today’s state-of-the-art devices consist of small crystals containing only about 1 million atoms (about 100 atoms in height, width, and thickness), so millions of these devices You can push it into this area about 1 million times. One coin that each device switches at a speed of about 1 million times per second.
Following innovation, for the first time, researchers were able to reduce the thickness of crystalline devices to only two atoms. Dr. Ben Shalom emphasizes that such a thin structure allows memory based on the quantum power of electrons to quickly and efficiently cross barriers that are only a few atoms thick. Therefore, it has the potential to significantly improve electronic devices in terms of speed, density, and energy consumption.
In this study, researchers used two-dimensional materials. It is a one-atom-thick layer of boron and nitrogen, repeatedly arranged in a hexagonal structure. In their experiments, artificially assembling these two layers was able to break the symmetry of this crystal. “In a natural three-dimensional state, this material is made up of multiple layers that overlap each other, with each layer rotating 180 degrees with respect to the adjacent layers (antiparallel configuration),” says Dr. Benshalom. ..
“In the laboratory, we were able to artificially stack layers in a non-rotating parallel configuration, which allows atoms of the same type to have strong repulsive forces between them (due to the same charge). However, in practice, crystals prefer to slide one layer slightly relative to the other, so only half of the atoms in each layer overlap completely, Overlapping atoms have opposite charges. All other atoms are above or above. Below an empty space — the center of the hexagon. In this artificial stacking configuration, the layers are quite different from each other, for example. If only the boron atoms overlap in the top layer, the opposite is true in the bottom layer. “
Dr. Benshalom additionally emphasizes the work of a theoretical staff that has carried out quite a few laptop simulations. Because of this primary understanding, we are able to anticipate engaging responses in different layered techniques with damaged symmetry, “he says.
Maayan Wizner Stern, a PhD pupil who led the examine, explains: Perpendicular to the layer airplane. When an exterior electrical subject is utilized in the wrong way, the system slides laterally to change the polarization path. The switched polarization is secure even when the exterior subject is shut down. On this respect, this technique is much like the thick 3D ferroelectric system extensively utilized in at this time’s know-how. “
“The power to power crystal and electron configurations in such skinny techniques, with distinctive polarization and inversion properties as a consequence of weak van der Waals forces between layers, is just not restricted to boron and nitrogen crystals,” Benshalom stated. He provides. .. “We anticipate the identical habits in lots of layered crystals with the right symmetry. The idea of interlayer slides as a novel and environment friendly strategy to management superior digital gadgets could be very promising. , We named it Slide-Tronics.
Maayan Vizner Stern concludes: “We’re excited to find what can occur in different states that naturally power us, and we anticipate that different buildings that mix further levels of freedom are potential. We hope that flipping with and slides will enhance at this time’s digital gadgets and likewise permit different distinctive methods to regulate data in future gadgets. Along with laptop gadgets, this know-how is a detector. We hope to contribute to power storage and conversion, interplay with mild, and so on. As we see, our problem is to find extra crystals with new slippery levels of freedom. is.”
Reference: M. ViznerStern, Y. Waschitz, W. Cao, I. Nevo, Okay. Watanabe, T. Taniguchi, E. Sela, M. Urbakh, O. “Interfacial ferroelectricity by van der Waals sliding” by Hod and M.Ben Shalom, June 25, 2021 Science..
DOI: 10.1126 / science.abe8177
This examine was funded by way of help from the European Analysis Council (ERC Initiation Grant), the Israeli Science Basis (ISF), and the Ministry of Science and Expertise (MOST).
The World’s Thinnest Expertise – Solely Two Atoms Thick Source link The World’s Thinnest Expertise – Solely Two Atoms Thick