A unified origin for the 3D magnetism and superconductivity in Nax_xCoO2_2

We analyze the origin of the three dimensional (3D) magnetism observed in nonhydrated Na-rich Na$_x$CoO$_2$ within an itinerant spin picture using a 3D Hubbard model. The origin is identified as the 3D nesting between the inner and outer portions of the Fermi surface, which arise due to the local minimum structure of the $a_{1g}$ band at the $\Gamma$-A line. The calculated spin wave dispersion strikingly resembles the neutron scattering result. We argue that this 3D magnetism and the spin fluctuations responsible for superconductivity in the hydrated systems share essentially the same origin.Comment: 5pages, 6figure

Unified Origin for the 3D Magnetism and Superconductivity in NaxCoO2

We analyze the origin of the three-dimensional (3D) magnetism observed in nonhydrated Na-rich NaxCoO2 within an itinerant spin picture using a 3D Hubbard model. The origin is identified as the 3D nesting between the inner and outer portions of the Fermi surface, which arise due to the local minimum structure of the a_1g band at the Γ-A line. The calculated spin wave dispersion strikingly resembles the neutron scattering result. We argue that this 3D magnetism and the spin fluctuations responsible for superconductivity in the hydrated systems share essentially the same origin.journal articl

Measurement of the Lepton Mass and an Upper Limit on the Mass Difference between + and -

journal articl

フィード バック ゴサ ガクシュウ ノ セイギョ オウヨウ ト ゼロテン オ モツ セイギョ タイショウ エノ タイサク

奈良先端科学技術大学院大学修士(工学)master thesi

Fundamental Properties of Chemical Mechanical Polishing for Copper Layer Assisted by Optical Radiation Pressure(<Special Issue>Advanced Manufacturing Technology)

This paper presents a corrective Cu-CMP (Chemical Mechanical Polishing) method for obtaining higher planarized surface by forming laser aggregation particles on recessed areas of uneven copper surface before polishing. At first, the component analysis and formation condition of aggregated particles were investigated, which is obtained by laser irradiation into the slurry on the copper surface. This result indicated that the aggregated marks were purely made of SiO_2 particles contained in slurry and the height of particle aggregation could be controlled by laser irradiation condition. Next, proposed planarization method for uneven surface of copper layer was attempted. As the polishing progressed, the height of aggregated marks was reduced. Then, it was confirmed that the aggregated marks play a role of masks, and no material removal at the bottom surface of recessed areas takes place during the polishing. This process made it possible to realize high planarity on copper surface.rights: 社団法人日本機械学会 rights: 本文データは学協会の許諾に基づきCiNiiから複製したものである relation: IsVersionOf:http://ci.nii.ac.jp/naid/110004820711textapplication/pdfjournal articl

SKLPT imaging: Efficient in vivo pre-evaluation of genome-editing modules using fluorescent protein with peroxisome targeting signal

text学術雑誌論文 / Journal Articlejournal articl

肺悪性腫瘍患者およぴ非腫瘍患者の療養不安に関する検討-入院経過における比較について-

当院呼吸器内科病棟に入院した肺悪性腫瘍患者と非腫瘍患者を対象に、入院時・退院時に不安尺度STAIを用いて調査を行なった。その結果、両群ともに入院時状態不安はSTAIの評価段階でIV(高い)であった。非腫瘍患者群では状態不安は退院時に有意に減少(p=0.025)するのに対して、肺悪性腫瘍患者では特性不安、状態不安ともに有意差がなかった。このことから入院時の不安は疾患に関係なく高い状態にあり、非腫瘍患者群では疾患の症状の改善等により不安が軽減されていることがわかった。不安の状態と睡眠状況について関連性は明らかにならなかった。journal articl