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arXiv · 1701.05010

Iron-based superconductivity extended to the novel silicide LaFeSiH

F. Bernardini·G. Garbarino·A. Sulpice·M. Núñez-Regueiro·E. Gaudin·B. Chevalier·M. -A. Méasson·A. Cano·S. Tencé
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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.

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F. Bernardini, G. Garbarino, A. Sulpice, M. Núñez-Regueiro, E. Gaudin, B. Chevalier, M. -A. Méasson, A. Cano, S. Tencé. 2017-01-18. Iron-based superconductivity extended to the novel silicide LaFeSiH. https://doi.org/10.1103/physrevb.97.100504

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