Novel multiple-band superconductor SrPt2As2

Abstract

We present LDA calculated electronic structure of recently discovered superconductor SrPt2As2 with Tc=5.2K. Despite its chemical composition and crystal structure are somehow similar to FeAs-based high-temperature superconductors, the electronic structure of SrPt2As2 is very much different. Crystal structure is orthorhombic (or tetragonal if idealized) and has layered nature with alternating PtAs4 and AsPt4 tetrahedra slabs sandwiched with Sr ions. The Fermi level is crossed by Pt-5d states with rather strong admixture of As-4p states. Fermi surface of SrPt2As2 is essentially three dimensional, with complicated sheets corresponding to multiple bands. We compare SrPt2As2 with 1111 and 122 representatives of FeAs-class of superconductors, as well as with isovalent (Ba,Sr)Ni2As2 superconductors. Brief discussion of superconductivity in SrPt2As2 is also presented.

5 pages, 4 figures

References in corpus (6)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• First Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals
• Superconductivity in SrNi2As2 Single Crystals
• Density functional study of BaNi${}_2$As${}_2$: Electronic structure, phonons and electron-phonon superconductivity
• Multiple Bands - A Key to High - Temperature Superconductivity in Iron Arsenides?

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• Electronic Structure of New Multiple Band Pt-Pnictide Superconductors APt3P
• Electronic structure of iron-based superconductors: from pnictides to chalcogenides and other similar systems
• Comparative Study of Electronic structure of New Superconductors (Sr,Ca)Pd2As2 and related compound BaPd2As2
• Weakness of Correlation Effect Manifestation in BaNi${}_2$As${}_2$: ARPES and LDA+DMFT study
• Possibility of charge density wave transition in SrPt${}_2$Sb${}_2$ superconductor