Large magnetoresistance in the iron-free pnictide superconductor LaRu$_2$P$_2$

Marta Fernández-Lomana; Víctor Barrena; Beilun Wu; Sara Delgado; Federico Mompeán; Mar García-Hernández; Hermann Suderow; Isabel Guillamón

paper

Large magnetoresistance in the iron-free pnictide superconductor LaRu $_{2}$ P $_{2}$

arXiv:2009.11585

Abstract

The magnetoresistance of iron pnictide superconductors is often dominated by electron-electron correlations and deviates from the H $^{2}$ or saturating behaviors expected for uncorrelated metals. Contrary to similar Fe-based pnictide systems, the superconductor LaRu $_{2}$ P $_{2}$ (T $_{c}$ = 4 K) shows no enhancement of electron-electron correlations. Here we report a non-saturating magnetoresistance deviating from the H $^{2}$ or saturating behaviors in LaRu $_{2}$ P $_{2}$ . We have grown and characterized high quality single crystals of LaRu $_{2}$ P $_{2}$ and measured a magnetoresistance following H $^{1.3}$ up to 22 T. We discuss our result by comparing the bandstructure of LaRu $_{2}$ P $_{2}$ with Fe based pnictide superconductors. The different orbital structures of Fe and Ru leads to a 3D Fermi surface with negligible bandwidth renormalization in LaRu $_{2}$ P $_{2}$ , that contains a large open sheet over the whole Brillouin zone. We show that the large magnetoresistance in LaRu $_{2}$ P $_{2}$ is unrelated to the one obtained in materials with strong electron-electron correlations and that it is compatible instead with conduction due to open orbits on the rather complex Fermi surface structure of LaRu $_{2}$ P $_{2}$ .

12 pages, 4 figures

References in corpus (1)

A Generic Two-band Model for Unconventional Superconductivity and Spin-Density-Wave Order in Electron and Hole Doped Iron-Based Superconductors

Large magnetoresistance in the iron-free pnictide superconductor LaRu2​P2​

Abstract

References in corpus (1)

Large magnetoresistance in the iron-free pnictide superconductor LaRu $_{2}$ P $_{2}$