Quatum Condensed-Matter Science Lab.

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RESEARCH TOPICS

We mainly focus on the basic research of the properties of solid state materials with the assistance of the quantum theory. Especially, influence of the defects or dopants on the properties of solids is studied with the aid of experimental and computational techniques.

Recent Topics

• Dilute magnetic materials
• Highly correlated electron systems
• Upconversion phosphors
• Organic-inorganic hybrid perovskite solar cell
• Bioceramics
• Solid oxide fuel cell
• Electrical Breakdown
• Chrge-up effect due to X-ray irradiation
• Tranparent conducting materials
• Photocatalytic materials
• Simulations with GPGPU

RECENT PUBLICATIONS

1. Existence of a polycrystal filled with an arbitrary finite number of self-similar crystals
   J. Phys. Soc. Jpn. 85, 045001 (2016)
2. Local environment analysis of Na ions in beta-tricalcium phosphate by X-ray absorption near-edge structure measurements and first-principles calculations
   Mater. Trans. 56, 1457-1460 (2015)
3. In situ measurements of work function of indium tin oxide after UV/ozone treatment
   Mater. Trans. 56, 1445-1447 (2015)
4. Quantum chemical study of the 1:1 complex between ferrocene and zinc porphyrin, a building-block of charge-transfer molecular materials
   Mater. Trans. 56, 1425-1427 (2015)
5. Substitution mechanism of Mn and Fe ions in Bi₄Ti₃O₁₂
   IEEE Trans. Mag. 50, 2502306 (2014)
6. In Situ measurements of the desorption of water from a TiO2 surface under dry air by collecting the photoemission yield with an open counter
   Annl. Sci. 30, 575-579 (2014)
7. Local environment of silicon in cubic boron nitride
   J. Appl. Phys. 114, 23502(2013)
8. Electronic structure analysis of Mn- and Fe-codoped In2O3 by photoemission yield measurements
   Physica B 407, 4485 (2012)
9. Determination of valence state of Mn ions in Pr1-xAxMnO3-d(A = Ca, Sr) by Mn-L3 X-ray absorption near-edge structure analysis
   J. Electron Spectrosc. Relat. Phenom. 185, 129 (2012)

COLLABORATING RESEARCHERS

• Prof. Kazuyuki HIROSE, ISAS/JAXA, Japan - SiO2/Si interface, Electrical breakdown, solar cell
• Prof. Kazuhiko KAWABATA, Kwansei Gakuin Univ. - Bioceramics
• Prof. Fabio PICHIERRI, Tohoku Univ., Japan - Organic-inorganic hybrid materials
• Prof. Akiko SEKINE. Tokyo Inst. Tech. Japan - Molecular crystals
• Prof. Kholmirzo T. KHOLMURODOV, JINR, Russia - Molecuklar dynamics simulations for functional materials
• Prof. Mikhail G. BRIK, Tartu Univ., Estonia - Optical materials
• Prof. Nam-Nhat HOANG, VNU-NET, Vietnam - Functional materials
• Prof. Hai-Chau NGUYEN, VNU-NET, Vietnam - Informatics simulations
• Prof. Tsutomu MIYASAKA, Toin Univ. Yokohama, Japan - Oraganic-inorganic hybrid solar cell
• Prof. Masashi IKEGAMI, Toin Univ. Yokohama, Japan - Oraganic-inorganic hybrid solar cell
• Dr. Toshihiro OKAJIMA, Saga-LS, Japan - X-ray absorption near-edge structure measurements, first-principles calculation
• Dr. Hidenobu NURATA, Yokohama City Univ., Japan - first-principles calculation
• Dr. Tsuyoshi YOSHIOKA, Teikyo Heisei Univ., Japan - Applied mathematical science

EQUIPMENTS (SELECTED)

• Furnace (Box type: 3, tube type: 2)



• RF Magnetron Sputtering equipment



• Drafter



• Powder X-ray Diffractometer (XRD)



• X-ray Photoelectron Spectrometer(XPS)



• UV-Vis Spectrometer



• Photoluminescence Spectrometer



• Cluster Computers