| odern physics based on quantum mechanics clarifies interesting phenomena that cannot be explained by classical physics (such as mechanics and electromagnetism). It also provides new inventions that can improve quality of our life in a revolutionary way. Researchers in Quantum Physics of Solid States study fundamental aspects of microscopic properties of solids as well as their applications. They deal with superconductors, semiconductors, dielectrics, and magnets made of both inorganic and organic materials. |
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We mainly study highly correlated electron systems in solid state physics such as physical properties of oxide high-Tc superconductors, coexistence of magnetism with superconductivity, iron pnictide superconductors, etc., based on high quality single crystals. We also challenge to explore new types of material with exotic physical properties. The discovery of THz LASER radiation in high-Tc superconductor Bi2Sr2CaCu2O8+d is an typical example. This will allow us to develop quantum computing devices and to explore a unprecedented area of research fields in biomedical science and technology in near future.
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By using ultra-broadband Spectroscopy, we have studied various kinds of disordered materials. Vibration and relaxation dynamics have been investigated on structural phase transitions of ferroelectric crystals and nanoparticles, liquid-glass transitions of oxide glasses and bioprotectants, and denaturation of protein crystals.
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Liquid helium (-296 ℃) and liquid nitrogen (-196 ℃) using on cryogen and we study the properties of high current density of high temperature superconductor oxide materials, and more developments regenerator materials. There are also improvements in refrigerator and improve superconducting gravimeter using cryogenic technology.
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To explore new optical functionalities, we fabricate and study spectroscopically nano-structured semiconductors such as quantum dots, organic molecular superlattices, organic-inorganic complexes, C60 nanotubes and amorphous. Pressure-induced phenomena of nano-structured materials are also investigated extensively.
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The research topics of our laboratory are development, characterization, and controls of performance of organic semiconductor devices using functional materials such as conducting π-conjugated polymers and oligomers. We investigate the topics by fabricating organic devices such as field-effect transistors (FETs) and solar cells, and by using characterization methods such as transport and electron spin resonance (ESR).
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Minami Lab.
・Non-linear transport properties of quantum para-electric materials ・Terahertz emitting devices employing the intrinsic Josephson junctions in High-Tc superconductors (with Kadowaki Lab.) |
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