Work

Superconducting density of states and vortex lattice of LaRu2P2 observed by scanning tunneling spectroscopy

Year: 2024

Type: article

Abstract: We provide the superconducting density of states of the pnictide superconductor LaRu2P2 (Tc = 4.1 K), measured using millikelvin scanning tunneling microscopy. From the tunneling conductance, we extract a density of states which shows the opening of a s-wave single superconducting gap. The temperature dependence of the gap also follows BCS theory. Under magnetic fields, vortices present Caroli de Gennes Matricon states, although these are strongly broadened by defect scattering. From the vortex core size we obtain a superconducting coherence length of ξ = 50 nm, compatible with the value extracted from macroscopic H c 2 measurements. We discuss the comparison between s-wave LaRu2P2 and pnictide unconventional multiple gap and strongly correlated Fe based superconductors.

Source: Journal of Physics Condensed Matter

DOI: 10.1088/1361-648x/ad82c9

Authors: Marta Fernández-Lomana, Paula Obladen Aguilera, Beilun Wu, Edwin Herrera, Hermann Suderow, Isabel Guillamón

Institutions: Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid

Language: English

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Comunidad de Madrid, Agencia Estatal de Investigación, H2020 European Research Council

Awards: G1286878830, G5283148391