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- W4280509446 abstract "In search of materials with three-dimensional flat band dispersions, using ab initio computations we investigate how topological phases evolve as a function of hydrostatic pressure and uniaxial strain in two types of superlattices: HgTe/CdTe and HgTe/HgSe. In short-period HgTe/CdTe superlattices, our analysis unveils the presence of isoenergetic nodal lines, which could host strain-induced three-dimensional flat bands at the Fermi level without requiring doping, when fabricated, for instance, as core-shell nanowires. In contrast, HgTe/HgSe short-period superlattices are found to harbor a rich phase diagram with a plethora of topological phases. Notably, the unstrained superlattice realizes an ideal Weyl semimetal with Weyl points situated at the Fermi level. A small-gap topological insulator with multiple band inversions can be obtained by tuning the volume: under compressive uniaxial strain, the material transitions sequentially into a Dirac semimetal to a nodal-line semimetal, and finally into a topological insulator with a single band inversion." @default.
- W4280509446 created "2022-05-22" @default.
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- W4280509446 date "2022-05-11" @default.
- W4280509446 modified "2023-10-13" @default.
- W4280509446 title "Topological states in superlattices of HgTe class of materials for engineering three-dimensional flat bands" @default.
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- W4280509446 doi "https://doi.org/10.1103/physrevresearch.4.023114" @default.
- W4280509446 hasPublicationYear "2022" @default.
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