Ni${}_2$X${}_2$ (X=pnictide, chalcogenide, or B) Based Superconductors

Abstract

We review the properties of Ni-based superconductors which contain Ni2X2 (X=As, P, Bi, Si, Ge, B) planes, a common structural element found also in the recently discovered FeAs superconductors. Strong evidence for the fully gapped nature of the superconducting state has come from field dependent thermal conductivity results on BaNi2As2. Coupled with the lack of magnetism, the majority of evidence suggests that the Ni-based compounds are conventional electron-phonon mediated superconductors. However, the increase in Tc in LaNiAsO with doping is anomalous, and mimics the behavior in LaFeAsO. Furthermore, comparisons of the properties of Ni- and Fe-based systems show many similarities, particularly with regards to structure-property relationships. This suggests a deeper connection between the physics of the FeAs superconductors and the related Ni-based systems which deserves further investigation.

arXiv comment21 pages, 4 figures, 3 tables; A review to appear in the Physica C special issue on superconducting pnictides

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Cited by in corpus (20)

• Superconductivity in Iron Compounds
• Crossover from weak to strong pairing in unconventional superconductors
• Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)
• New ternary ThCr2Si2-type iron-selenide superconducting materials: synthesis, properties and simulations
• Electronic structure and Fermi surface of new K intercalated iron selenide superconductor KxFe2Se2
• Properties of Binary Transition-Metal Arsenides (TAs)
• Nd induced Mn spin-reorientation transition in NdMnAsO
• Heavy Fermion Quantum Criticality and Destruction of the Kondo Effect in a Nickel Oxypnictide
• Experimental Progress on the Emergent Infinite-Layer Ni-Based Superconductors
• Electronic band structure and Fermi surface for new layered superconductor LaO0.5F0.5BiS2 in comparison with parent phase LaOBiS2 from first principles
• Antiferromagnetism in semiconducting SrMn2Sb2 and BaMn2Sb2 single crystals
• Multi-gap nodeless superconductivity in nickel chalcogenide TlNi2Se2
• Fully gapped superconductivity in SrNi${}_2$P${}_2$
• Electronic structure of the 344-type superconductors La3(Ni;Pd)4(Si;Ge)4 by ab initio calculations
• Evolution of Structure and Superconductivity in Ba(Ni${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Elastic properties and inter-atomic bonding in new superconductor KFe2Se2 from first principles calculations
• Fully gapped superconductivity in Ni-pnictide superconductors BaNi2As2 and SrNi2P2
• Electronic structure of superconducting Lu2Ni3Si5 and its reference compound Y2Ni3Si5 by ab initio calculations
• Mach-Type Soliton in the Novikov-Veselov Equation
• Electronic properties of new low-temperature superconductors: 3.3K (Ni2P2)(Sr4Sc2O6) and 2.7K (Ni2As2)(Sr4Sc2O6) from first principles