High-pressure lithium as an elemental topological semimetal
| Autor: | Elatresh, S. F., Zhou, Zhimou, Ashcroft, N. W., Bonev, S. A., Feng, Ji, Hoffmann, Roald |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. Materials 3, 044203 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevMaterials.3.044203 |
| Popis: | Topological semimetals generally contain heavy elements. Using density-functional theoretic calculations, we predict that three dense lithium polymorphs in the pressure range 200--360 GPa display nontrivial semimetallic electronic structure. Specifically, these high-pressure phases exhibit Fermi pockets which are degenerate over a loop in $\boldsymbol{k}$-space, around which an encircling $\bm k$-space path is threaded by $\pm \pi$ Berry phase. Accordingly, these dense lithium phases are topological nodal loop semimetals involving a single light element. Comment: 6 pages,6 figures |
| Databáze: | arXiv |
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