A different substance as a source of hope
About electrons in MoTe2 To slow it down, you place two layers of 2D material on top of each other and twist them three to four degrees. This creates a stream of anions at the edge of the sample, each of which has a third of the electron charge. High quality mote2Producing samples with such a small twist angle requires a lot of experimental effort.
After the authors of the four studies achieved this feat, they demonstrated FQAH in different ways. Teams led by physicist Jiaqi Cai of the University of Washington and Lihang Zeng of Cornell University examined the electronic properties of the material using light. The electromagnetic field of light affected electronic features in ways that could only be explained by FQAHE. Zeng and his colleagues supported this conclusion by also examining the material’s local electronic compression. However, the group led by Heonjoon Park of the University of Washington and Fan Xu of Shanghai Jiao Tong University took a different approach: they made electrical contacts to directly measure transverse electrical conductivity, a clear indicator of FQAHE.
Solid-state physicists have been eagerly awaiting such an observation. The findings from the four specialized groups could lead to important technological applications. However, there is still a long way to go until the next breakthrough: making anyons available for quantum computation. By controlling the anions, the quantum state of the solid can be controlled, which can be used to store and process information. Such quantum calculations with anyons could be much more powerful than those performed with previous qubits. However, the currently observed FQAHE contain only the simplest types of anions, which are called abelian anions. However, quantum calculations require non-abelian anions, which are much more difficult to understand than those examined in these four studies.
One way to create non-abelian anions is to combine a material with abelian anions using a superconductor. According to theoretical considerations, a superconductor can transform edge currents into non-Abelian instances. Since magnetic fields affect the conductivity of a material, this was not yet possible. Discovery of abelian anions in twisted MoTe2 Without an external magnetic field it can be pioneered. Hybrid components made from MoTe2Layers and superconductors will undoubtedly present new experimental hurdles, but the creative and diligent solid-state physics community must rise to the challenge.
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