Engineering topological phases in the Luttinger semimetal $\alpha$-Sn

23 May 2018 Zhang Dongqin Wang Huaiqiang Ruan Jiawei Yao Ge Zhang Haijun

$\alpha$-Sn is well known as a typical Luttinger semimetal with a quadratic band touching at the $\Gamma$ point. Based on the effective $k\cdot p$ analysis as well as first-principles calculations, we demonstrate that multiple topological phases with a rich diagram, including topological insulator, Dirac semimetal, and Weyl semimetal phases, can be induced and engineered in $\alpha$-Sn by external strains, magnetic fields, and circularly polarized light (CPL)... (read more)

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  • MESOSCALE AND NANOSCALE PHYSICS