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arXiv · 1811.06401

LnPd$_{2}$Sn (Ln=Sc, Y, Lu) class of Heusler alloys for topological superconductivity

Peng-Jie Guo·Jian-Feng Zhang·Huan-Cheng Yang·Zheng-Xin Liu·Kai Liu·Zhong-Yi Lu
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Abstract

Based on the first-principles electronic structure calculations and the symmetry analysis, we predict that the topological superconductivity may occur on the surface of the LnPd$_{2}$Sn (Ln=Sc, Y, Lu) class of Heusler alloys. The calculated electronic band structure and topological invariant demonstrate that the LnPd$_{2}$Sn family is topologically nontrivial. The further slab calculations show that the nontrivial topological surface states of LnPd$_{2}$Sn exist within the bulk band gap and meanwhile they cross the Fermi level. Considering that the LnPd$_{2}$Sn class of compounds were all found experimentally to be superconducting at low temperature, the surface topological superconductivity is likely to be generated via the proximity effect. Thus the LnPd$_{2}$Sn class of compounds shall be a promising platform for exploring novel topological superconductivity and handling Majorana zero modes.

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Peng-Jie Guo, Jian-Feng Zhang, Huan-Cheng Yang, Zheng-Xin Liu, Kai Liu, Zhong-Yi Lu. 2018-11-15. LnPd$_{2}$Sn (Ln=Sc, Y, Lu) class of Heusler alloys for topological superconductivity. https://arxiv.org/abs/1811.06401

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