Engineering of the first half -metal wild quantum crystal

Proposal of Bulkov Valentz without a multi -layer structure. Credit: Nature (2025). Doi: 10.1038/S41586-024-08330-Y
The International Research Team, led by the RIKEN’s Institute of Research Institute of Research (CEMS), demonstrates the ideal wilderly metal in the world for the first time and brings a breakthrough on the problem of quantum materials for 10 years. Ta.
Wilphermion occurs as a collective quantum excitation of electrons in crystals. They are predicted to show exotic electromagnetic characteristics and are attracting strong interest around the world.
However, despite the thousands of crystals, most of the previous virts so far have shown electricity conduction that is overwhelmingly dominated by unwanted trivial electrons, covering the wilderfermion. Finally, researchers hold a pair of vizes of wilderfermi and synthesize substances that do not have unrelated electronic state.
This study, published in Nature, was born from a four -year joint research at CEMS, RIKEN theories and Mathematical Science Mathematical Fusion Program (ITHEMS), the University of Tokyo quantum electronics center (QPEC), and the University of Tokyo Metal Materials Research Institute. Tohoku University and South Sea Science and Technology in Singapore.
Researchers produced wild semiconductors from topology semiconductors, and re -examined strategies that were first theoretically proposed in 2011, but were abandoned and were mostly forgotten by the community.
The semiconductor has a small “energy gap”, which allows you to switch between insulating and conduct, forming a basics of commercial transistors. Half -metals can be regarded as a kind of extreme state of zero semiconductors, which are exactly the values between the insulator and the metal.
This extreme case is still very rare in actual material. Probably the most well -known example is graphene, which has been found in Moale Physics and Flexible Electronics.
The topological semiconductor used in current research is Teruled Bismas BI2TE3. Researchers adjusted the chemical composition of materials in a highly controlled way, and used chrome instead of bismas, creating (CR, BI) 2TE3.
According to Dr. Ryota Watanabe, he is a student and co -author, “We were initially interested in (CR, BI) 2TE3’s large abnormal hall effect (AHE). This is. It suggested a new physics that exceeds the topology semiconductor. “
“Unlike conventional (CR, BI) 2TE3’s unique simple electronic structure,” ITHEMS co-author, ITHEMS co-author, “experiments using accurate theory. Following the large AHE, we will go back to the Wilfermon.
CEMS, the leading author, reminiscent that this discovery was a shock to both himself and his colleagues around the world.
“Various communities have already established important theoretical and experimental insights necessary for the synthesis of this wild semi -metal, but we did not communicate with each other, and we missed this discovery. Looking back, it should have been about 10 years. “”
Regarding the reason why the insight was ultimately obtained in RIKEN, Velopalsky believes that it is a unique combination of excellent researchers, generous research funds, and CEMS dynamic and intelligent atmosphere.
“There were many talented research groups that have been working on related themes for many years throughout the United States, China, and Europe. It is thought to be due to the environment.
One of the potential use is Terahertz (THZ) devices. The semiconductor can only absorb only lightmen with more energy than that energy gap. This usually excludes the THZ frequency range.
According to Yuki Sato, a co -author and doctoral researcher in this paper, “Unlike semiconductors, semi -metals have an energy gap, so you can absorb low -frequency lights up to terahertz frequencies. We are currently interested in applying the ideal wiles. ” “
The research team is looking forward to high -performance sensors, low -power electronics, and new opt electronics devices. As the publishing of the research approached, Lixuan Tai, a postdoc researcher who joined the strong phase quantum transport laborator, has expressed his excitement on short -term research that can be made by this new quantum phase of substances.
“It is a particularly exciting time to participate in this research team, as it will ensure that many exciting progress can be obtained by being able to obtain actual wilderly metal after many years.”
Detailed information: Ilya Belopolski et al, a synthesis of a semi -gold wilderly magnetic body with a Fermi surface, Nature (2025). Doi: 10.1038/S41586-024-08330-Y
Quoted: The first half-metal wild quantum crystal engineering (January 24, 2025) https://phys.org/news/2025-01-semimetallic-weyl-quantum-crystal.html on January 24, 2025 Acquisition
This document is subject to copyright. Except for fair transactions for personal research and research, any part cannot be duplicated without writing permission. Content is provided only for information provision.