AQP -seminaari: Dirac semimetal-based quantum devices towards 1D topological superconductivity

Abstract: 

One of the main directions to realize the topological quantum bit is combining topological materials with conventional superconductors. The notion of topological phases has been extended to higher-order and has been generalized to different dimensions. In the last few years, our research demonstrates the possibility of realizing the topological superconductivity in engineered 3D Dirac semimetals [1,2] and their 1D hinge states. Particularly, Cd₃As₂ is predicted to be a higher-order topological semimetal, possessing three-dimensional bulk Dirac fermions, two-dimensional Fermi arcs [3], and one-dimensional hinge states [4]. These topological states have different characteristic length scales in electronic transport, allowing one to distinguish their properties when changing sample size.

References:

[1] Li, C. et al. Nat. Mater. 17, 875–880 (2018).

[2] Wang, A. Q. et al. Phys. Rev. Lett. 121, 237701 (2018).

[3] Li, C.-Z. et al. Nat. Commun. 11, 1150 (2020).

[4] Li, C.-Z. et al. Phys. Rev. Lett. 124, 156601 (2020).