文献一覧: 日本物理学会 (出版者)

最近の実験技術の進展によって, 光パルスの伝搬速度(群速度)を光速cより大きくしたり, 逆に自転車なみの速度に減速させ, さらには停止させることすら可能になってきた. このような異常光伝搬は応用面から強い関心が寄せられているのみならず, 波動伝搬の物理を再検討する契機にもなっている. 本稿では電気回路による光の伝搬のシミュレーションを通して, 超光速群速度の物理的意味や光パルス凍結の原理に迫る.

2013-08-11 21:43:03
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https://ci.nii.ac.jp/naid/110004811658

1 0 0 0 平成29年度科学研究費助成事業(科研費,基盤研究等)審査結果報告

著者: 長谷川剛白濱圭也大槻東巳
出版者: 日本物理学会
雑誌: 日本物理学会誌 = Butsuri (ISSN:00290181)
巻号頁・発行日: vol.73, no.4, pp.249-251, 2018-04

2018-05-04 01:23:26
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https://ci.nii.ac.jp/naid/40021513222

1 0 0 0 OA テバトロン実験でヒッグス粒子にどこまで迫れるか

著者: 金信弘増渕達也
出版者: 日本物理学会
雑誌: 日本物理学会誌 (ISSN:00290181)
巻号頁・発行日: vol.64, no.6, pp.440-444, 2009-06

米国フェルミ国立加速器研究所の陽子反陽子衝突型加速器テバトロンを用いて行われている大型国際共同実験CDFとD0でのヒッグス粒子探索の結果と今後の展望について報告する.The CDF and Dzero experiments at Tevatron protonantiproton collider at Fermi National Accelerator Laboratory in Batavia, Illinois, USA, have recently set the upper limit of the Higgs particle mass to 185GeV/c^2 by measuring the top quark mass and the W boson mass precisely. They have also excluded the existence of the Higgs particle with a mass of 170GeV/c^2 at 95% confidence level through direct search for the Higgs particle. The Tevatron experiment will have two or three times more data of which analyses will make the allowed Higgs mass region narrower and may result in finding evidence for Higgs particle production.

2018-01-23 05:01:41
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http://hdl.handle.net/2241/103971

1 0 0 0 OA First-Principles Study of Electric Field Effects on Magnetic Anisotropy in MgO/TM/Au (TM = Fe, Co) Systems

著者: Suzuki Shugo Yasuda Sho Edakawa Kazuki Seki Saori
出版者: 日本物理学会
雑誌: Journal of the Physical Society of Japan (ISSN:00319015)
巻号頁・発行日: vol.82, no.12, pp.124715, 2013-11
被引用文献数: 7

We study the electric field (EF) effects on the magnetic anisotropy in the MgO/TM/Au (TM = Fe, Co) systems with (001) and (111) orientations using relativistic first-principles calculations based on the density functional theory. We find that the perpendicular magnetic anisotropy of the MgO/TM/Au(001) system is enhanced by the EF that decreases the number of electrons in the system. The magnetic anisotropy energy (MAE) and its EF dependence of the MgO/Fe/Au(001) system is found to be in a semi-quantitative agreement with the experimental results with successful reproduction of the sign of the measured EF dependence. Furthermore, the EF dependence of the MAE of the MgO/Co/Au(001) system is found to be very large due to the structural relaxation of the Co–O interatomic distance and the decrease in the number of electrons in the Co atom caused by the EF. This result is attributed to the general trend that the perpendicular magnetic anisotropy of the Co layer is affected significantly when in contact with an inert layer at an interlayer distance of about 2 Å. On the contrary, we find that the MgO/TM/Au(111) system shows almost no EF dependence of the MAE. This result is attributed to the existence of a strong TM–O covalent bond associated with the oxidation of the TM atom by the O atom.