DOE OSTI · 3378249
Superconducting phase diagram of multilayer square-planar nickelates
Abstract
The discovery of superconductivity in square-planar nickelates has offered a rich materials platform to explore the origins of high-temperature superconductivity. However, experimental investigations have largely been limited to the infinite-layer R NiO 2 ( R , rare earth) nickelates. For this work we constructed a phase diagram of multilayer square-planar Nd n+1 Ni n O 2n+2 compounds and found signatures of superconductivity for dimensionality n = 4 to 8. Upon decreasing n , the superconducting anisotropy evolves owing to 4ƒ electron effects, and electronic structure characteristics approach cuprate-like behavior. Magnetic fluctuations persist from within the superconducting regime and into the overdoped, nonsuperconducting regime. The superconducting regime overlaps with that of chemically doped infinite-layer nickelates, demonstrating underlying commonalities as well as differences across varying structural realizations of square-planar nickelates. Our work establishes this layered template for creating new nickel-based superconductors.
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Pan, Grace A. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000245121215), Segedin, Dan Ferenc [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000171628100), TenHuisen, Sophia F. R. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000243797035), Bhatt, Lopa [Cornell Univ., Ithaca, NY (United States)] (ORCID:0000000151832761), LaBollita, Harrison [Arizona State Univ., Tempe, AZ (United States)] (ORCID:0000000266998577), Jiang, Abigail Y. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000180038380), Song, Qi [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000212544131), Turkiewicz, Ari B. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000157290289), Baykusheva, Denitsa R. [Harvard Univ., Cambridge, MA (United States)], Nag, Abhishek [Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.] (ORCID:0000000213945105), Agrestini, Stefano [Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.] (ORCID:000000023625880X), Zhou, Ke-Jin [Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.] (ORCID:0000000192930595), Pelliciari, Jonathan [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0000000315087746), Bisogni, Valentina [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0000000273999930), Zhou, Hua [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000196428674), Dean, Mark P. M. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000151393543), Paik, Hanjong [Cornell Univ., Ithaca, NY (United States)] (ORCID:0000000283634679), Muller, David A. [Cornell Univ., Ithaca, NY (United States). Kavli Institute at Cornell for Nanoscale Science] (ORCID:0000000341290473), Kourkoutis, Lena F. [Cornell Univ., Ithaca, NY (United States). Kavli Institute at Cornell for Nanoscale Science] (ORCID:0000000213031362), Brooks, Charles M. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000190877321), Mitrano, Matteo [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000201020391), Botana, Antia S. [Arizona State Univ., Tempe, AZ (United States)] (ORCID:0000000159733039), Goodge, Berit H. [Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)] (ORCID:0000000309487698), Mundy, Julia A. [Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000184540124). 2026-06-25. Superconducting phase diagram of multilayer square-planar nickelates. https://doi.org/10.1126/science.adp4440
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