Superconductivity in layered Zintl phase LiSn2As2

2021/11/22 by Junjie Wang, Wang, Junjie, Xiangru Cui +9
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Iron-based superconductors research #Materials Science (cond-mat.mtrl-sci) #Superconductivity (cond-mat.supr-con) #Surface and Thin Film Phenomena

paper · pdf · doi:10.48550/arxiv.2111.11319

openalex publication_date 2021/11/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report the superconductivity in the layered Zintl phase LiSn₂As₂, which is isostructural to NaSn₂As₂ and has a transition temperature (T_c) of 1.6 K. Despite similar T_c and Debye temperatures, substituting of Na with Li considerably increases the upper critical field. Based on a systematically comparation of Sn₄As₃, NaSnAs, NaSn₂As₂,Na_1-xSn₂P₂, SrSn₂As₂, and LiSn₂As₂, we propose that carrier doping, intimately related to the formation of lone-pair electrons, controls superconductivity in layered SnAs-based compounds rather than chemical pressure. The current findings provide a thorough and comprehensive understanding of Sn-based Zintl phase.

Citations

• From ultrasoft pseudopotentials to the projector augmented-wave method
• Generalized Gradient Approximation Made Simple
• Recent advances in magnetic structure determination by neutron powder diffraction
• Electron-Phonon Interaction in Metals
• Special points for Brillouin-zone integrations
• Zintl Phase BaAgSb: Low Thermal Conductivity and High Performance Thermoelectric Material in Ab Initio Calculation

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