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Novel States of Matter Induced by Frustration

  • Term of Project:2007-2011
  • Number of Core Researchers : 36

People

  • Head
    • Hikaru KAWAMURA (Osaka U.)
  • Steering Comittee
    • Hiraku KAWAMURA (Osaka U.)
    • Satoru MAEGAWA (Kyoto U.)
    • Hirotsugu TSUNETSUGU (U. Tokyo)
    • Hiroshi KAGEYAMA (Kyoto U.)
    • Takahisa ARIMA (U. Tokyo)
    • Kenji OHWADA (JAEA)
    • Hiroko KATORI (Tokyo Univ. Agriculture)
  • Advisory Commitee
    • Kazuo UEDA (U. Tokyo)
    • Yoshitami AJIRO (RIKEN)
    • Hajime TAKAYAMA
    • Motohiro MATSUURA
    • Yoshinori TOKURA (U. Tokyo)

Target

“Frustration” represents the situation where several optimization conditions compete with each other so that the system cannot satisfy them simultaneously. In material science, it has recently been recognized that frustration shows up and plays an important role in a variety of systems including magnets, metals, superconductors and dielectrics. In such “frustrated“ systems, novel effects due to enhanced fluctuations arise, leading to an exotic order and a new thermodynamic phase, gigantic responses and novel off-equilibrium dynamics such as memory effects. In this project, we aim to develop new material properties, new concepts and new functions induced by frustration through close cooperation between fundamental research and application research.

Organization

A01 Fundamental Properties of Frustrated Systems

  • Head : Satoru MAEGAWA (Kyoto U.)
  • Cores
    • Novel Order in Geometrically Frustrated Magnet
      • Satoru MAEGAWA (Kyoto U.), Hitoshi OHTA (Kobe U.), Hikomitsu KIKUCHI (Fukui U.), Akira OYAMADA (Kyoto U.), Kazuyuki MATSUHIRA (Kyutech. U.)
    • Frustration and Chirality
      • Hikaru KAWAMURA (Osaka U.), Toshihumi TANIGUCHI (Osaka U.), Hajime YOSHINO (Osaka U.), Makoto HAGIWARA (Osaka U.), Hiroyuki DEGUCHI (Kyutech. U.), Shigeki ONODA (RIKEN)
    • Quantum Frustration
      • Hiroshi KAGEYAMA (Kyoto U.), Yutaka UEDA (U. Tokyo), Takatsugu MASUDA (U. Tokyo), Kazuhisa KAKURAI (JAEA), Naoki KAWASHIMA (U. Tokyo)
  • Collaborators
    • Inelastic neutron scattering study of spin excitations and lattice dynamics in geometrically frustrated systems
      • Keisuke TOMIYASU (Tohoku U.), Shinichi IKEDA (AIST), Tadataka WATANABE (Nihon U.), Shigeo HARA (Chuo U.), Yusuke KOSAKA (Aoyama U.)
    • Berry phases in frustrated magnets and its application
      • Yasuhiro HATSUGAI (U. Tsukuba), Isao MARUYAMA (Osaka U.), Yuji HAMAMOTO (U. Tsukuba)
    • Anomalous magnetotransport in itinerant magnets with spin chirality
      • Yoshinori ONOSE (U. Tokyo), Satoshi IGUCHI (Satoshi IGUCHI)
    • Magnetic transition and slow spin dynamics in S = 1/2 Kagome Lattice
      • Makoto YOSHIDA (U. Tokyo)
    • Thermodynamic investigations of frustrated compounds which have novel spin liquid behaviors under various conditions
      • Yasuhiro NAKAZAWA (Osaka U.)
    • Single Crystal Growth and Study of Novel Quantum Magnetism ind-electron Compounds M2(OH)3X
      • ZHENG Xu-Guang (Saga U.)
    • Evidence of exotic magnetic states in triangle spin tubes
      • Hirotaka MANAKA (Kagoshima U.), Yoko MIURA (Suzuka National college of technology)
    • Topological excitations in frustrated systems
      • Hiroaki KADOWAKI (Tokyo Metropolitan U.)
    • Development and quantum effects of geometrically frustrated spin systems made of organic radicals
      • Yuko HOSOKOSHI (Osaka Prefecture U.)
    • Theoretical and numerical study on anomalous quantum phenomena in the Kagome lattice antiferromagnets
      • Toru SAKAI (JAEA), Hiroki NAkANO (U. Hyogo), Makoto ISODA (Kagawa U.)
    • Finite-temperature properties of anisotropic-two-dimensional frustrated magnets
      • Masanori KOHNO (NIMS)
    • Dynamical quantities in chiral and multipolar phases of low-dimensionalfrustrated magnets
      • Tsutomu MOMOI (RIKEN), Toshiya HIKIHARA (Hokkaido U.), Masahiro SATO (Aoyama U.)

A02 Frunstation-induced Novel Phenomena and their Applications

  • Head: Hirotsugu TSUNETSUGU (U. Tokyo)
  • Cores
    • Frustration and Quantum Transport
      • Hirotsugu TSUNETSUGU (U. Tokyo), Zenji HIROI (U. Tokyo), Hiroyuki NAKAMURA (Kyoto U.), Satoshi FUJIMOTO (Kyoto U.), Noriaki HANASAKI (Osaka U.), Satoru NAKATSUJI (U. Tokyo)
    • Frustration and Multiferroics
      • Takahisa ARIMA (U. Tokyo), Yukio NODA (Tohoku U.), Sumio ISHIHARA (Tohoku U.)
    • Frustration and Relaxor
      • Kenji OHWADA (JAEA), Shigeo MORI (Osaka Prefecture U.), Yusuke TOMITA (U. Tokyo), Masato MATSUURA (Tohoku U.), Yusuke WAKABAYASHI (Osaka U.), Minoru SODA (U. Tokyo)
    • Geometrical frustration and functions in spin-charge-lattice coupled system
      • Hiroko KATORI (Tokyo U. Agriculture), Hidenori TAKAGI (U. Tokyo), Yukitoshi MOTOME (U. Tokyo), Shigeki FUJIYAMA (RIKEN)
  • Collaborators
    • Search for novel behavior of multiferroic phase induced by quantum spins
      • Yukio YASUI (Nagoya U.), Ichiro TERASAKI (Nagoya U.)
    • NMR study on electronic states of frustrated electron systems with coupled spin, charge, and orbital degrees of freedom
      • Masayuki ITOH (Nagoya U.), Yasuhiro SHIMIZU (Nagoya U.)
    • Trimerization in frurstrated systems with orbital degrees of freedom
      • Takuro KATSUFUJI (Waseda U.)
    • Theoretical study on the new state of matter in strongly correlated and frustrated electronic systems
      • Chisa HOTTA (Kyoto Sangyo U.)
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