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{\Large \bf Low-Dimensional Quantum Physics Group}\\

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Professor           &:&Naoki~Toyota\\
Associate Professor&:&Hiroshi~Matsui\\
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(http://ldp.phys.tohoku.ac.jp/)\\
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In an interdisciplinary way between chemistry and physics, our group is studying fundamental electronic functions like conductivity, superconductivity, magnetism, and dielectricity on low-dimensional charge transfer, nanoporous molecular materials, and biological systems. There are highly confined electron's motional degrees of freedom in a plane, chain or topologically curved channels. With dynamical conductivity measurements up to terahertz wave, our strategic targets are placed on the following materials. 

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1. Quasi two-dimensional (BEDT-TSF)$_{2}$MX$_{4}$ (M = Fe, Ga and X = Cl, Br) salts\\ ((bis)ethylenedithio-tetraselenafulvalene) in which the superconductivity, metal-insulator transition, and magnetic ordering are interplaying each other. Recently we revealed, in the salt with FeCl$_{4}$ anion, quite novel dielectric phenomena in a high temperature metallic phase followed by ferroelectric-like ordering associated by antiferromagnetic insulator transition at T = 8.3 K. 

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2. Novel carbon mesoporous crystals with topologically curved channels like CMK-$n$\\ ($n$ = 1 - 4) synthesized by Prof. R. Ryoo's group (KAIST in Korea). 

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3. Carbon nanotubes grown in channel cavities with diameter of 0.5 - 1.0 nm of AlPO$_{4}$-5 zeolite synthesized by Prof. Z. Tang's group (HKUST in China).

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4. Highly oriented DNA (Prof. T. Kawai's group in Osaka) and lysozyme single crystals of high quality grown under high magnetic fields (Prof. K. Nakajima's group, Sendai)

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