Topological descendants of a multicritical Dirac semimetal with magnetism and strain

Article

关键词: TOTAL-ENERGY CALCULATIONS;    PRESSURE;    SCHEMES;    CATALOG;   

DOI  :  10.1103/PhysRevB.104.165107

来源: SCIE

【 摘 要 】

The past decades have witnessed a transformation in characterizing condensed matter systems with topology. Aided by a refined understanding of topological band structures with crystalline symmetries that has emerged recently, many electronic phases have been identified, and a plethora of materials have been predicted to host properties and functionalities. A key underlying question, also with respect to future application, is to what extent the related physical features can be manipulated, especially in the context of magnetic order. Here, we describe a paradigmatic semimetal that simultaneously incorporates multiple and sometimes conflicting topology which guarantees gaplessness and leads to an exceptionally rich family of descendent phases on lowering symmetry. We predict that this multicritical phase is realized in EuTl2. Starting from the parent semimetallic state, which already separates two topological insulating regimes, the interplay of inherent magnetism and strain allows for an exceptionally rich phase diagram of topological descendant states.

【 授权许可】

Free