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Photo of Yoshiteru Maeno

Yoshiteru Maeno Materials scientist

Yoshiteru Maeno is a leader in the field of ruthenate physics, investigating oxide materials with the same crystal structure as cuprates, the well-known high-Tc superconductors. In 1994, Maeno discovered superconductivity in the ruthenates, and has since then led an impressive, highly collaborative research program on these materials.

Ruthenate superconductivity is now believed to result from a revolutionary “spin-triplet” state, in which not only do the electronic charges become superfluid, but also the spins of electrons. Maeno is a superb crystal grower, as well as a low-temperature scientist specializing in specific-heat measurements, and makes the very best crystals of Sr2RuO4 which he shares with other Associates in the CIFAR Program.

Maeno’s other research interest lies in oxide materials with geometrically frustrated spins. Using his own high-quality crystals, he has investigated their unusual physical properties, such as spin-ice and Kagome ice states. The aims of investigating these materials are to search for superconductivity based on unconventional features and for a quantum spin-liquid state in which electrons spinning in an insulator form coherent pairs.


Superconductivity Science and Technology Award in Japan, 2000.

Ryogo Kubo Memorial Award, 2000.

Relevant Publications

Y. Maeno et al, "Substitution for copper in a high-Tc superconductor YBa2Cu3O7–δ," Nature, vol. 328, pp. 512-514, Aug. 1987.



Associate Fellow Quantum Materials


Kyoto UniversityDepartment of Physics and the International Innovation Center


PhD (Physics) University of California at San Diego

MS (Physics) University of California at San Diego

B.Sc. (Physics) Kyoto University



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