Km Rubi, King Yau Yip, Elizabeth Krenkel, Nurul Fitriyah, Xing Gao, Saurav Prakash, S Lin Er Chow, Chi Sin Tang, Tsz Fung Poon, Swee K Goh, Sean M Thomas, Adam P Dioguardi, Oscar E Ayala-Valenzuela, Mark B H Breese, Mun K Chan, David Graf, A Ariando, Neil Harrison
Magnetic fields typically suppress superconductivity through Pauli and orbital limiting effects. However, there are rare instances of magnetic-field-induced superconductivity, as observed in Chevrel-phase compounds, organic conductors, uranium-based heavy-fermion systems, and moiré graphene-although these materials possess inherently low superconducting transition temperatures (Tc). Here, we demonstrate high-field-stabilized superconductivity in a class of materials recently shown to have significantly higher Tc values (up to 40 K): the infinite-layer nickelates. We show that both the low-field and high-field superconducting states can be understood in terms of a field-compensation mechanism, better known as the Jaccarino-Peter effect. These findings demonstrate the possibility of achieving substantially enhanced upper critical fields in high-temperature superconductors.