Magnetic field enhanced superconductivity in Eu-doped infinite-layer nickelates

Magnetic fields typically suppress superconductivity through Pauli and orbital limiting effects. However, there are rare instances of magnetic-field-induced superconductivity, as seen in Chevrel phase compounds [1], organic conductors [2], uranium-based heavy-fermion systems [3, 4], and moire graphene [5], though these materials possess inherently low superconducting transition temperatures (Tc). In this talk, I will present a high field-reentrant superconductivity in a class of materials with a significantly higher Tc: the infinite-layer nickelates [6, 7]. Both low-field and high-field superconducting states can be plausibly explained by a compensation mechanism akin to the Jaccarino-Peter effect. These findings highlight the technological potential of nickelates for ultra-high magnetic field applications such as superconducting magnets and quantum magnetometers.

References

[1] H. W. Meul et al, Physical Review Letters 53, 497 (1984).

[2] S. Uji et al, Nature 410, 908 (2001).

[3] F. L_evy, I. Sheikin, B. Grenier, and A. D. Huxley, Science 309, 1343 (2005).

[4] S. Ran et al., Science 365, 684 (2019).

[5] Y. Cao et al. , Nature 595, 526 (2021).

[6] S. L. E. Chow, Z. Luo, and A. Ariando, Nature 642, 58 (2025).

[7] K. Rubi et al., arXiv:2508.16290 (2025).