Protection mechanism | Nature Physics


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Much of the excitement surrounding graphene and the wider class of so-called Dirac materials arises from their unusual electronic structure, in which low-energy electrons effectively mimic


the motion of relativistic high-energy particles known as Dirac fermions. A notable recent addition to this family has been that of three-dimensional Dirac semimetals, bulk 'analogues' of


graphene that have been realized in materials such as Na3Bi and Cd3As2.


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