A periodic table of elements expressed in three dimensions Elementouch Yoshiteru MAENO Kyoto University

Profile of Yoshiteru Maeno


Yoshiteru MAENO
Yoshiteru MAENO
Professor, Department of Physics, Kyoto University

Currently, my most interesting research themes are related to "quantum condensed phase" such as spin triplet superconductivity and quantum spin liquid state. The method is to develop new substances and develop new physical properties brought about by them. As an experimental technique, we are creating a laboratory with a particular focus on cryogenic physics.

Ruthenium oxide Sr2RuO4, which we discovered superconductivity in 1994, has the same crystal structure as the high-temperature superconductor of copper oxide. In previous studies, the superconductivity is spin triplet. It is now certain that it is due to electron pairs. All conventional superconductivity is a spin single term (spin singlet) in which two electrons form a pair of spin antiparallels, whereas a spin triple term is an electron pair. This is the first time that this has been experimentally confirmed with a groundbreaking state of parallel spins.

In spin triplet superconductivity, not only the superfluidity of the electron property "charge" appears, but also the other important property "spin" has the epoch-making property of having superfluidity at the same time. Can be done.

Currently, we are promoting the cultivation of high-purity, high-quality single crystal materials, elucidating the details of the superconducting state and the superconducting mechanism, and conducting research to develop new superconducting phenomena and functions unique to spin triplets. We are promoting.

Research results published on the cover of the November 2001 issue of the Journal of the Physical Society of Japan.
Cover page of the November 2001 issue of "Butsuri", a journal from the Physical Society of Japan. The central figure depicts the electron pair of the spin-triplet superconductivity in Sr2RuO4. Small arrows represnt electron spins; a large arrow represents orbital moment of a pair. From the article "Physics of Spin-Triplet Superconductivity" (Y. Maeno and K. Deguchi).
Fermi surface of S2RuO4 drawn based on the experimental results of quantum oscillation. It consists of three cylindrical Fermi surfaces. The figure is provided by C. Bergemann. From the commentary article "The Intriguing Superconductivity of Strontium Ruthenate" (Y. Maeno, T.M. Rice, and M. Sigrist).



B.Sc. in Physics, Kyoto University
thesis title: "Vortex Refrigerator"
thesis advisors: Prof. A. Hirai and Dr. T. Mizusaki
M.S. in Physics, University of California, San Diego
Ph.D. in Physics, University of California, San Diego
thesis title: "Oscillatory Convection in a Dilute 3He-Superfluid 4He Solution"
thesis advisor: Prof. J.C.Wheatley

Professional Employment

Collaborator, Los Alamos National Laboratory, USA
Research Associate, Department of Physics, Hiroshima University
Associate Professor, Department of Physics, Hiroshima University
Associate Professor, Department of Physics, Kyoto University
Professor, International Innovation Center and Department of Physics, Kyoto University.
Professor, Department of Physics, Kyoto University
1988/06 -
Visiting Scientist, IBM Research, Ruschlikon (Zurich), Switzerland


Superconductivity Science and Technology Award
(co-awarded with M.Sigrist)
Ryogo Kubo Memorial Award
Japan IBM Science Award
Daiwa-Adrian Prize (awarded for the Japan-UK collaboration by Y.Maeno and A.P. Mackenzie)
Thomson-Japan Research Front Award (based on ISI Web of Science citations in 1998-2003, awarded to 16 Japanese scientists in all areas of sciences.)
2008 Minister of Education, Culture, Sports, Science and Technology Award Science and Technology Award (Research Division)
Bernd T. Matthias Prize
"For the 1994 discovery and subsequent purification of S2RuO4
that creates a unique platform for revealing decisively
some unusual features of superconductivity."
The Texas Center for Superconductivity at the University of Houston
Nishina Memorial Prize
Discovery of Spin-Triplet Superconductor - Ruthenium Oxide
The medal with Purple Ribbon from the Government of Japan