Classifying superconductivity in an infinite-layer nickelate Nd0.8Sr0.2NiO2

Results in Physics

E.F. Talantsev¹ 

[1] M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 18, S. Kovalevskoy St., Ekaterinburg 620108, Russia;

关键词: Superconductivity;    Infinite-layer nickelate;    Upper critical field;    Self-field critical current density;    Superconducting energy gap;    London penetration depth;   

DOI  :  

来源: DOAJ

【 摘 要 】

Recently Li et al. (2019 Nature 572 624) discovered a new type of oxide superconductor Nd0.8Sr0.2NiO2 with Tc = 14 K. To classify superconductivity in this infinite-layer nickelate experimental upper critical field, Bc2(T), and the self-field critical current densities, Jc(sf,T), reported by Li et al. (2019 Nature 572 624), are analysed in assumption of s-, d-, and p-wave pairing symmetries and single- and multiple-band superconductivity. Based on deduced the ground-state superconducting energy gap, Δ(0), the London penetration depth, λ(0), the relative jump in electronic specific heat at Tc, ΔC/C, and the ratio of 2Δ(0)/kBTc, we conclude that Nd0.8Sr0.2NiO2 is type-II high-κ weak-coupled single-band s-wave superconductor.

【 授权许可】

Unknown