研究者詳細 - 旭　良司

論文 - 旭　良司

分割表示 175 件中 141 - 160 件目／全件表示 >>

Thermoelectric properties of Ca-doped (ZnO)(m)In2O3 ceramics and their improvement upon texture 査読有り

Kaga H, Asahi R, Tani T

DEVELOPMENTS IN DIELECTRIC MATERIALS AND ELECTRONIC DEVICES 167 巻頁： 127 - 136 2005年

Thermoelectric Properties of Highly Textured Ca-Doped (ZnO)_mIn_2O_3 Ceramics 査読有り

Kaga Hisashi, Asahi Ryoji, Tani Toshihiko

Japanese journal of applied physics. Pt. 1, Regular papers & short notes 43 巻 ( 10 ) 頁： 7133 - 7136 2004年10月

Thermoelectric Properties of Doped (ZnO)_mIn_2O_3 査読有り

Kaga Hisashi, Asahi Ryoji, Tani Toshihiko

Japanese journal of applied physics. Pt. 1, Regular papers & short notes 43 巻 ( 6 ) 頁： 3540 - 3543 2004年6月

First Principles Calculations of Auger Recombination and Impact Ionization Rates in Semiconductors 査読有り

Picozzi S., Asahi R., Freeman A. J.

JOURNAL OF COMPUTATIONAL ELECTRONICS 2 巻 ( 2-4 ) 頁： 197 - 202 2003年12月

Growth of In2O3(ZnO)(5) platelet micro-crystals by flux methods 査読有り

Xia CT, Asahi R, Tani T

JOURNAL OF CRYSTAL GROWTH 254 巻 ( 1-2 ) 頁： 144 - 150 2003年6月

窒素ドープ型酸化チタン可視光応答光触媒の解析査読有り

大脇健史, 森川健志, 青木恒勇, 旭良司, 多賀康訓, 磯村典武

表面科学 : hyomen kagaku = Journal of the Surface Science Society of Japan 24 巻 ( 1 ) 頁： 25 - 30 2003年1月

記述言語：日本語掲載種別：研究論文（その他学術会議資料等）出版者・発行元：公益社団法人日本表面科学会

N-doped titanium oxide photocatalyst is found to be activated by visible light irradiation as well as ultraviolet irradiation. We evaluated its crystal structure, N states in the lattice, composition, and surface morphology using X-ray diffiraction (XRD), X-ray photoemission spectroscopy (XPS), and scanning probe microscopy (SPM). As a result, it is found that the materials have rutile or anatase crystal structure with nitrogen doped into substitutional sites of oxygen in TiO<Sub>2</Sub>, which contributes band gap narrowing. It is also confirmed that XPS measurement was influenced by surface treatment such as Ar ion bombardment.

DOI： 10.1380/jsssj.24.25

CiNii Research

Accurate first-principles detailed-balance determination of Auger recombination and impact ionization rates in semiconductors 査読有り Open Access

Picozzi S, Asahi R, Geller CB, Freeman AJ

PHYSICAL REVIEW LETTERS 89 巻 ( 19 ) 2002年11月

Impact Ionization in GaAs within A Screened Exchange Density Functional Formalism 査読有り

Picozzi S.

Journal of Computational Electronics 1 巻 ( 3 ) 頁： 421 - 424 2002年10月

First-principles calculations for understanding high conductivity and optical transparency in InxCd1-x films 査読有り

Asahi R, Wang A, Babcock JR, Edleman NL, Metz AW, Lane MA, Dravid VP, Kannewurf CR, Freeman AJ, Marks TJ

THIN SOLID FILMS 411 巻 ( 1 ) 頁： 101 - 105 2002年5月

Surface properties of the refractory metal-nitride semiconductor ScN: Screened-exchange LDA-FLAPW investigations 査読有り

Stampfl C, Asahi R, Freeman AJ

PHYSICAL REVIEW B 65 巻 ( 16 ) 頁： 1 - 4 2002年4月

Impact ionization in GaAs: A screened exchange density-functional approach 査読有り Open Access

Picozzi S, Asahi R, Geller CB, Continenza A, Freeman AJ

PHYSICAL REVIEW B 65 巻 ( 11 ) 頁： 1 - 4 2002年3月

Photocatalysts sensitive to visible light - Response 査読有り

Asahi R, Morikawa T, Ohwaki T, Aoki K, Taga Y

SCIENCE 295 巻 ( 5555 ) 頁： 627 - 627 2002年1月

Electronic structure of misfit-layered calcium cobaltite 査読有り

Asahi R, Sugiyama J, Tani T, Xia CT

XXI INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT '02 頁： 203 - 206 2002年

Excited states and optical properties entirely from first principles: Extended FLAPW method and its graphical user interface 査読有り

Kim MY, Asahi R, Freeman AJ

JOURNAL OF COMPUTER-AIDED MATERIALS DESIGN 9 巻 ( 3 ) 頁： 173 - 201 2002年

Electronic structure of misfit-layered calcium cobaltite 査読有り

Asahi R., Sugiyama J., Tani T.

Physical Review B - Condensed Matter and Materials Physics 66 巻 ( 15 ) 頁： 1 - 7 2002年

Electronic structure of misfit-layered calcium cobaltite 査読有り

Asahi R.

International Conference on Thermoelectrics, ICT, Proceedings 2002-January 巻頁： 203 - 206 2002年

Effect of GGA on the half-metallicity of the itinerant ferromagnet CoS2 査読有り

Shishidou T, Freeman AJ, Asahi R

PHYSICAL REVIEW B 64 巻 ( 18 ) 2001年11月

Electronic structure and small polaron hole transport of copper aluminate 査読有り

Ingram BJ, Mason TO, Asahi R, Park KT, Freeman AJ

PHYSICAL REVIEW B 64 巻 ( 15 ) 2001年10月

Computational band-structure engineering of III-V semiconductor alloys 査読有り

Geller CB, Wolf W, Picozzi S, Continenza A, Asahi R, Mannstadt W, Freeman AJ, Wimmer E

APPLIED PHYSICS LETTERS 79 巻 ( 3 ) 頁： 368 - 370 2001年7月

Visible-light photocatalysis in nitrogen-doped titanium oxides 査読有り

Asahi R, Morikawa T, Ohwaki T, Aoki K, Taga Y

SCIENCE 293 巻 ( 5528 ) 頁： 269 - 271 2001年7月

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