Evidence for nodal superconductivity in infinite-layer nickelates
Year: 2025
Type: article
Abstract: Infinite-layer nickelates present a new family of potential unconventional superconductors. A key open question is the superconducting pairing symmetry. We present low-temperature measurements of the magnetic penetration depth in optimally doped La 0.8 Sr 0.2 NiO 2 , Pr 0.8 Sr 0.2 NiO 2 , Nd 0.8 Sr 0.2 NiO 2 , and Nd 0.7875 Sr 0.2125 NiO 2 . For La- and Pr-nickelates, the superfluid density shows a quadratic temperature dependence, indicating nodal superconductivity in the presence of disorder. Nd-nickelate exhibits complex low-temperature behavior associated with Nd 4 f magnetism, which precludes a direct measure of the nodal structure.
Institutions: SLAC National Accelerator Laboratory, Stanford University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: G1286251239, The infinite layer rare earth nickelates: a novel family of superconductor, G2371548206, G237429762, G303061748, G3702897590, G4654690619, Harold Hwang Materials Synthesis Investigator, G5473946529, G5570207115, G5599649393, G628552264, G6550344761, G7283024673, Structural and electronic properties of oxide structures and oxide interfaces, G911061179, G969889393
OpenAlex ID: W4416714756