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Magnetic Materials Laboratory
Hidenori TAKAGI
Chief Scientist
Hidenori TAKAGI (D.Eng.)
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Research Areas

We explore a wide variety of electronic phases formed by strongly interacting electrons (strongly correlated electrons) and the physics behind. The topics include exotic superconductivity, quantum magnetism and metal-insulator transitions. Our playgrounds are in transition metal oxides and rare earth intermetallic where d-electrons and f-electrons dominate the electronic properties. We will be working on properties and functions related with not only magnetism but also a novel spin-charge-lattice coupled phenomena. Development of local probes for magnetism and electronic states are also in progress.

Research Subject

  1. Strongly correlated electron systems-novel materials and functions
  2. Nano-scale characterization of strongly-correlated electron systems
  3. Development of an advanced measurement system for novel electronic states
  4. Quantum magnetism

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Individual Website Laboratory PageNew Window

Press release

April 23, 2010
New mechanism for superconductivity discovered in iron-based superconductors
March 17, 2008
RIKEN-JST team develops ceramic material with zero thermal expansion Stability should make material ideal in ultrafine precision machiningNew Window
November 01, 2007
Dr. T. Hanaguri and Dr. H. Takagi of the DRI's Magnetic Materials Laboratory have successfully demonstrated a visualized electron wave in a state of high-temperature superconduction and provided evidence by use of this technique that an electron wave propagating towards a particular direction does not contribute to superconduction in the case of materials with relatively low transition temperature.

RIKEN RESEARCH

April 15,2011
Mercury rising
Mercury-containing oxides offer a new perspective on the mechanism of superconductivityNew Window
January 28, 2011
Using complex electron systems to create green materials
Research on spin frustration in complex electron systems could help solve some of the world's pressing energy problemsNew Window
July 02,2010
Measuring unconventionality
Interference patterns made by wave-like electrons reveal that tiny atomic magnets are critical to iron-based superconductors New Window
April 24, 2009
The pairing habits of superconductors
A microscopy technique unveils previously hidden information on the nature of superconductivity New Window
March 07,2008
Heavy out of frustration
Constraints on the arrangement of electrons and ions in a metal compound lead to electrons with a very heavy mass New Window
February 08, 2008
'Virtual' reality check for superconductors
New clues important to our understanding of superconductivity are provided by precise measurements of electronic states New Window

List of Selected Publications

  1. T. Hanguri et al.:
    "Unconventional s-Wave Superconductivity in Fe(Se,Te)"
    Science 328, 474 (2010).
  2. H. Kuriyama et al.:
    "Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site"
    Appl. Phys. Lett. 96, 182103 (2010).
  3. T. Hanaguri et al.:
    "Momentum-resolved Landau-level spectroscopy of Dirac surface state in Bi2Se3"
    Phys. Rev. B 82, 081305(R) (2010).
  4. B.J. Kim et al.:
    "Phase-sensitive observation of a spin-orbital Mott state in Sr2IrO4"
    Science 323, 1329 (2009).
  5. K. Takenaka et al.:
    "Conversion of magnetic structure by slight dopants in geometrically frustrated antiperovskite Mn3GaN"
    Appl. Phys. Lett. 95, 132508 (2009).
  6. T. Hanaguri et al.:
    "Coherence Factors in a High-Tc Cuprate Probed by Quasi-particle Scattering off Vortices"
    Science 323, 923 (2009).
  7. Y. Kohsaka, et al.:
    "How Cooper pairs vanish approaching the Mott insulator in BSCCO"
    Nature 454, 1072 (2008).
  8. P. Jonsson et al.:
    "Correlation-Driven Heavy-Fermion Formation in LiV2O4"
    Phys. Rev. Lett., 99, 167402 (2008)
  9. Y. Okamoto et al.:
    "Band Jahn-Teller Instability and Formation of Valence Bond Solid in a Mixed-Valent Spinel Oxide LiRh2O4"
    Phy. Rev. Lett. 101, 086404 (2008).

Members

Principal Investigator

Hidenori TAKAGI
Chief Scientist

Staff Scientist

Hiroki YAMAZAKI
Senior Research Scientist
Tetsuo HANAGURI
Senior Research Scientist
Jobu MATSUNO
Senior Research Scientist
Shigeki FUJIYAMA
Senior Research Scientist
Alimamy Forkie BANGURA
Research Scientist
Seiji NIITAKA
ASI Research Scientist
Yuhki KOHSAKA
ASI Research Scientist
Ayako YAMAMOTO
ASI Research Scientist

Postdoctoral Fellow

Yukari OKAMOTO-KATSURA
Special Postdoctoral Researcher
Yingshuang FU
Foreign Postdoctoral Researcher
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