The global maldistribution of energy resources causes regional differences in industrial development. It may also lead to regional differences in economy and hygiene, or even regional conflicts. With the current technology, it is difficult to evenly distribute energy sources over the earth. However, if room temperature superconductivity is realized, the costs in energy transportation can be eliminated because it enables energy transfer without loss. If a superconductor, which exhibits very high critical field, is discovered, it will also make us one step closer to the application of superconductivity.

　With this in mind, we look for new superconducting materials and try to discover novel superconducting properties. For example, a nuclear magnetic resonance study has revealed the existence of novel symmetry in the electronic interaction, suggesting a new way of application as a material for quantum computing. ( K. Matano, et al., Nature Phys. 12, 852–854  (2016)). We also discovered that, in a superconducting material that contains Fe atoms, a new superconducting state emerges under high-magnetic fields, showing that its upper critical field is strongly enhanced by forming this new pairing state. (S. Kasahara, et al., Phys. Rev. Lett. 127, 257001 (2021)).

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