Iron-based superconductivity extended to the novel silicide LaFeSiH

Abstract

We report the synthesis and characterization of the novel silicide LaFeSiH displaying superconductivity with onset at 11 K. We find that this pnictogen-free compound is isostructural to LaFeAsO, with a similar low-temperature tetragonal to orthorhombic distortion. Using density functional theory we show that this system is also a multiband metal in which the orthorhombic distortion is likely related to single-stripe antiferromagnetic order. Electrical resistivity and magnetic susceptibility measurements reveal that these features occur side-by-side with superconductivity, which is suppressed by external pressure.

arXiv comment5 + epsilon pages, 7 figures, Supplemental Material on demand; v2 includes additional magnetization and resistivity data; v3 includes additional resistivity data from LaFeSiH single crystal

References in corpus (21)

• Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
• Two-dome structure in electron-doped iron arsenide superconductors
• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• Bipartite magnetic parent phases in the iron-oxypnictide superconductor
• Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors
• Electronic nematic susceptibility of iron-based superconductors
• Interplay of magnetic and structural transitions in Fe-based pnictide superconductors
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Magnetic interactions in iron superconductors: A review
• The phase diagrams of iron-based superconductors: theory and experiments
• Correlated pressure effects on structure and superconductivity in LaFeAsO0.9F0.1
• Unconventional superconductivity in the layered iron germanide YFe${}_2$Ge${}_2$
• Fermi liquid breakdown and evidence for superconductivity in YFe${}_2$Ge${}_2$
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Direct observation of the influence of the As-Fe-As angle on the Tc of superconducting SmFeAsO${}_{1-x}$F${}_x$
• Magnetoelastic Effects in Iron Telluride
• Crystal growth and annealing study of fragile, non-bulk superconductivity in YFe${}_2$Ge${}_2$
• Non-trivial role of interlayer cation states in iron-based superconductors
• Effect of uniaxial pressure on the magneto-structural transitions of iron arsenide superconductors
• Electronic Scattering Effects in Europium-Based Iron Pnictides
• Why MgFeGe is not a superconductor

Cited by in corpus (8)

• Investigation of hydrogen incorporations in bulk infinite-layer nickelates
• Heavily Hydride-ion-doped 1111-type Iron-based Superconductors: Synthesis, Physical Properties and Electronic Structure
• Reducing the strain required for ambient-pressure superconductivity in bilayer nickelates
• Evidence of nodal superconductivity in LaFeSiH
• Composition dependence of bulk superconductivity in YFe2Ge2
• First-principles study of magnetism, lattice dynamics, and superconductivity in LaFeSiH${}_x$
• Magnetic and structural properties of the iron silicide superconductor LaFeSiH
• Magnetic competition in iron-based germanide and silicide superconductors