ISSP - The institute for Solid State Physics

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Y. Matsuda Group
Associate Professor
MATSUDA,
Yasuhiro

Research Associate
IKEDA,
Akihiko

Research Associate
NAKAMURA,
Daisuke

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We have studied properties of matters that emerge under ultrahigh magnetic fields of up to 1000 T. Ground state of matter can dramatically be changed by applying such strong magnetic field, since spin and kinetic motion of electrons are directly affected by magnetic field. Various kinds of novel phases are expected to emerge in the strong magnetic fields through the phenomena such as formation of nontrivial magnetic structure in low dimensional spin systems, exotic local-itinerant transition in strongly-correlated magnetic compounds, and strong spin-lattice coupling in molecular solids. The field-induced phase transition without thermal excitation at a low temperature is a quantum phase transition where the excited state in weak fields transforms to the new ground state in strong fields. Thus, hidden potential characters of matter appear in strong magnetic fields and novel phenomena can occur. Only short-duration destructive pulsed magnets can produce strong fields far exceeding 100 T; beyond overcoming the technical difficulties regarding the destructive magnetic field, unexplored research fields open. We have also enthusiastically developed new measurement techniques to discover the exotic novel phases in the field range of 100 ~ 1000 T.

Magnetic field dependence of the magnetic-field derivative of the magnetization (dM/dB) in S=1/2 two-leg organic spin-ladder compound BIP-BNO. The distinct two peaks are the characteristic of the spin ladder system.
Magnetostriction of LaCoO3 measured with the Fiber Bragg Grating (FBG). The results at different temperatures are shown.

Research Subjects

  1. Magnetic-field-induced insulator-metal transition
  2. Ultrahigh-magnetic-field magnetization process of quantum spin systems
  3. Electronic state of heavy fermion and valence fluctuating systems at ultrahigh magnetic fields
  4. Magnetic-field-induced structural phase transition in solid oxygen
  5. Properties of matters with strong spin-lattice coupling in high magnetic fields