Yoshinori Tokura

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Yoshinori Tokura ( Japanese 十 倉 好 紀 , Tokura Yoshinori ; born March 1, 1954 in Hyōgo Prefecture ) is a Japanese physicist .

Life

Tokura studied physics since 1976 at the University of Tokyo in the Faculty of Engineering in the Department of Applied Physics and received his doctorate in 1981. From 1986 to 1993 he was an associate professor at the Faculty of Natural Sciences in the Department of Physics. From 1994 to 1995 he was a professor at the graduate school in the physics department and since 1995 in the applied physics department. From 2001 to 2008 he was also the head of the Correlated Electron Research Center (CERC) of the National Institute of Advanced Industrial Science and Technology (AIST). In 2007 he moved to the RIKEN research center, where he was director of a research department (in addition to his professorship at the University of Tokyo) until 2013. In 2013 he became the founding director of the “Center for Emergent Matter Science” at RIKEN, which he still heads today.

research

Tokura's research area is quantum materials , in particular the physical properties of metal oxides with strongly correlated electrons. His early achievements include the discovery (together with Hidenori Takagi and Shin-ich Uchida ) of high-temperature superconductors , whose charge transport in the normal state is based on electron conduction - instead of hole conduction in the superconducting copper oxide originally discovered by Georg Bednorz and Karl-Alex Müller . Links. This gave important impulses for the theory of high-temperature superconductivity. He later worked on manganese oxide compounds and made important contributions to the exploration of the " colossal magnetoresistive (CMR) effect " observed in these materials. In particular, he showed that the CMR effect is due to the competition between ferromagnetic metallic and antiferromagnetic insulating phases of the electronic system. In further work on manganese oxides, Tokura showed that the magnetization in these materials can be efficiently controlled by electric fields and the electric polarization by magnetic fields. Tokura is one of the founders of modern research on multiferroics . Tokura later turned to topological transport phenomena in magnetic materials and is currently investigating u. a. magnetic skyrmions and their influence on the transport properties of quantum materials.

Based on an analysis of the Web of Science database , Tokura is one of the most cited scientists in his research field, and in 2014 he was listed as a Citation Laureate by Thomson Reuters .

Awards

Tokura is an external member of the Royal Swedish Academy of Sciences .

Web links

Individual evidence

  1. ↑ S. Uchida, H. Takagi, Y. Tokura: A superconducting copper oxide compound with electrons as the charge carriers . In: Nature . tape 337 , no. 6205 , January 1989, ISSN  1476-4687 , pp. 345–347 , doi : 10.1038 / 337345a0 ( nature.com [accessed January 26, 2019]).
  2. ↑ A. Urushibara, Y. Moritomo, T. Arima, A. Asamitsu, G. Kido: Insulator-metal transition and giant magnetoresistance in La 1-x Sr x MnO 3 . In: Physical Review B . tape 51 , no. 20 , May 15, 1995, pp. 14103–14109 , doi : 10.1103 / PhysRevB.51.14103 ( aps.org [accessed January 26, 2019]).
  3. ^ Y Tokura: Critical features of colossal magnetoresistive manganites. In: Reports on Progress in Physics. February 27, 2006, pp. 69.797 - 851 (2006) , accessed on January 26, 2019 (English).
  4. ^ Y. Tokura, T. Arima, K. Ishizaka, H. Shintani, T. Goto: Magnetic control of ferroelectric polarization . In: Nature . tape 426 , no. 6962 , November 2003, ISSN  1476-4687 , p. 55–58 , doi : 10.1038 / nature02018 ( nature.com [accessed January 26, 2019]).
  5. ↑ Y. Tokura, N. Nagaosa, H. Yoshizawa, Y. Oohara, Y. Taguchi: Spin Chirality, Berry phase, and Anomalous Hall Effect in a Frustrated ferromagnet . In: Science . tape 291 , no. 5513 , March 30, 2001, ISSN  0036-8075 , p. 2573-2576 , doi : 10.1126 / science.1058161 , PMID 11283363 ( sciencemag.org [accessed January 26, 2019]).
  6. ^ Y. Tokura, S. Ishiwata, XZ Yu, S. Seki: Observation of Skyrmions in a Multiferroic Material . In: Science . tape 336 , no. 6078 , April 13, 2012, ISSN  0036-8075 , p. 198–201 , doi : 10.1126 / science.1214143 , PMID 22499941 ( sciencemag.org [accessed January 26, 2019]).
  7. ↑ Yoshinori Tokura, Naoto Nagaosa: Topological properties and dynamics of magnetic skyrmions . In: Nature Nanotechnology . tape 8 , no. December 12 , 2013, ISSN  1748-3395 , p. 899–911 , doi : 10.1038 / nnano.2013.243 ( nature.com [accessed January 26, 2019]).
personal data
SURNAME Tokura, Yoshinori
ALTERNATIVE NAMES 十 倉 好 紀 (Japanese)
BRIEF DESCRIPTION Japanese physicist
DATE OF BIRTH March 1, 1954
PLACE OF BIRTH Hyogo Prefecture