Classifying superconductivity in an infinite-layer nickelate Nd$_{0.8}$Sr$_{0.2}$NiO$_2$

E. F. Talantsev

doi:10.1016/j.rinp.2020.103118

paper

Classifying superconductivity in an infinite-layer nickelate Nd $_{0.8}$ Sr $_{0.2}$ NiO $_{2}$

arXiv:1912.06099 · doi:10.1016/j.rinp.2020.103118

Abstract

Recently Li et al (2019 Nature 572 624) discovered a new type of oxide superconductor Nd0.8Sr0.2NiO2 with T $_{c}$ = 14 K. To classify superconductivity in this infinite-layer nickelate experimental upper critical field, B $_{c 2}$ (T), and the self-field critical current densities, J $_{c}$ (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, $Δ$ C/C, and the ratio of 2 $Δ$ (0)/k $_{B}$ T $_{c}$ , we conclude that Nd0.8Sr0.2NiO2 is type-II high- $κ$ weak-coupled single-band s-wave superconductor.

13 pages, 2 figures, 1 table

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

Abstract

Classifying superconductivity in an infinite-layer nickelate Nd $_{0.8}$ Sr $_{0.2}$ NiO $_{2}$