Researcher A. Kumatani and Associate Professor T. Hitosugi -- World record achieved in superconducting transition temperature of transparent superconductor --


-Liquid helium temperature exceeded for the first time: possibilities for future applications in opto-electronic devices-

The group led by Researcher Akichika Kumatani and Associate Professor Taro Hitosugi, Advanced Institute for Materials Research (AIMR) Tohoku University, has succeeded in the production of "transparent superconductor" that possesses 60% transmittance of visible light with a superconducting transition temperature of 13 kelvin.

A superconductor LiTi2O4, which turned out to be a superior transparent superconductor, was delicately fabricated in a thin film form. This superconductor has the world record in superconducting transition temperature at 13 kelvin, as a transparent superconductor. The temperature surpasses the temperature of liquid helium (4 kelvin), enabling experiments of superconductivity easier than before. This development opens paths toward applications in optoelectronic devices such as light emitting diodes and sensors utilizing superconductivity. Furthermore, the films show low electrical resistance and conductivity at room temperature, showing promising possibilities for the future applications as an indium-free transparent conductor.

More information (Japanese)


(About the research)

Associate Professor Taro Hitosugi
Advanced Institute for Materials Research (AIMR), Tohoku University
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