新規に合成されたPrおよびSm化合物の軟X線光電子分光による電子状態の解明

用软 X 射线光电子能谱阐明新合成的 Pr 和 Sm 化合物的电子态

• 批准号: 18740201
• 负责人: 山崎 篤志
• 金额: $ 1.28万
• 依托单位: Konan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18740201/
• 关键词: 光物性; 強相関; 軟X線; 光電子分光; 硬X線; 充填スクッテルダイト

本年度は計画の最終年度であり,H18年度に実施したSmOs_4Sb_<12>の硬X線光電子分光に続き,以下に述べる実験を行うとともに,Pr,NdおよびSmを充填したスクッテルダイトに対するバルク電子状態についてまとめた.実施した実験は,(1)軟X線光電子分光によるSmOs_4Sb_<12>のフェルミ準位近傍の電子状態の温度変化,(2)硬X線光電子分光によるPrRu_4P_<12>における金属絶縁体転移に伴う価電子帯電子状態変化の観測,(3)軟X線光電子分光によるNdOs_4Sb_<12>の価電子および内殻電子状態の観測,(4)硬X線光電子分光によるPrFe_4P_<12>の電子状態の温度変化である.本研究計画当初は,軟X線を用いた光電子分光のみを計画していたが,よりバルク電子状態に敏感な硬X線による光電子分光が利用可能になり,希土類3d内殻を中心によりバルク敏感な光電子スペクトルを得ることに成功した.特に,PrRu_4P_<12>におけるT=60Kでの金属絶縁体転移に関して,硬X線光電子分光とクラスターモデル計算の結果から伝導電子と4f電子との間の強い混成が転移に寄与している一方で,この混成が金属相から絶縁体相への変化に対しては鈍感である(安定している)ことを見いだした.またPrFe_4P_<12>との比較を通して,この系で見られる異常物性が充填スクッテルダイトの特異な結晶構造に由来していることを明らかにした.H18-19年度の研究から,希土類充填スクッテルダイトにおける結晶構造と異常物性の密接な関わりをSmとPrの両方の系において確認した.上記のような研究結果に対して,第15回真空紫外分光国際会議(VUVXV)において発表すると共に,論文4報にまとめた.

This year is planned to be the most expensive for the year. In H18, the SmOs _ 4Sbaked LTX is used for 12kg; the hard X-ray photovoltaic spectroscopic system is used. The following description shows that the performance of the Sm system is very high, and that of the Pr,Nd system is very high. The main results are as follows: (1) the temperature of the SmOs _ 4Sbod photoelectron spectrometer is 12gt; the temperature of the close-to-electron state is changed; (2) the hard X-ray optoelectronic spectrometer is PrRu _ 4Phosphor LTX 12gt; the metal mass transfer is accompanied by the thermal emission of the electronic computer, and (3) the NdOs _ 4Sbprinter lt12gt is used in the X-ray photoelectron spectroscopy. The internal electronic state of the electric power plant is high, (4) the hard X-ray photoelectron spectroscopy is PrFe _ 4, and the temperature of the electric state is 12 μ g. In the beginning of this study, X-ray photovoltaic spectrometer was used to design photovoltaic spectroscopy. in this study, X-ray photoelectron spectroscopy was used in the beginning of this study. in the beginning of this study, X-ray photoelectron spectroscopy was designed to be used in the first half of the year. In this paper, PrRu_4P_<12> is used to transfer the metal body of 60K metal alloy, and the hard X-ray photoelectron spectroscopy is used to calculate the results of the calculation. The results show that the 4f electrons are strongly mixed with each other and sent to one party, and the metal phase is mixed to make the metal phase change. In this paper, the results show that the normal physical properties are in good agreement with each other, and the results show that there are significant differences between the two groups in terms of their properties. The results show that there are significant differences between the two groups in the study of H18-19. In the study of H18-19, the results of the study in H18-19 show that the normal physical properties are closely linked with the normal physical properties. The Pr of the Sm is confirmed by the computer. In the last chapter, the results of the study were reviewed. The 15th International Conference on vacuum Ultraviolet Spectroscopy (VUVXV).

项目成果

Hard and soft x-ray spectroscopy of SmOs_4Sb_<12> -Coexistence of Strongly Mixed Valence and Heavy-Fermion Character-

SmOs_4Sb_<12>的硬和软X射线光谱 -强混合价和重费米子特征的共存-

• 发表时间: 2007
• 作者: A. Yamasaki(第1著者)他18名;A. Yamasaki(第3著者)他9名;A. Yamasaki(第4著者)他8名;A. Yamasaki(第3著者)他9名;A.Yamasaki(第1著者)他15名;A.Yamasaki(第1著者)他13名;A.Yamasaki(第1著者)他15名;A.Yamasaki(第7著者)他10名;A.Yamasaki(第12著者)他13名;A. Yamasaki(登壇者)他15名
• 通讯作者: A. Yamasaki(登壇者)他15名

Photoemission study of (V1-xMx)2O3 (M=Cr,Ti)

• DOI: 10.1103/physrevb.74.165101
• 发表时间: 2006-10-01
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Mo, S. -K.;Kim, H. -D.;Metcalf, P.
• 通讯作者: Metcalf, P.

Stability of electronic states across metal-insulator transition in PrRu_4P_<12>

PrRu_4P_<12> 金属-绝缘体跃迁过程中电子态的稳定性

• 发表时间: 2008
• 期刊: Physical Review B (印刷中)
• 作者: A. Yamasaki(第1著者)他18名

Soft X-ray spectroscopy of possibly heavy fermion compound NdOs_4Sb_<12>

可能的重费米子化合物NdOs_4Sb_<12>的软X射线光谱

• 发表时间: 2007
• 期刊: Phys. Rev. B76
• 作者: S.Imada;et. al.
• 通讯作者: et. al.

Electron correlation and the metal-insulator transition of the pyrochlore molybdates R 2 Mo 2 O 7 ( R = Nd , Sm , Gd , Tb , Y )

• DOI: 10.1103/physrevb.75.155106
• 发表时间: 2007-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: A. Higashiya;S. Imada;A. Yamasaki;A. Irizawa;A. Sekiyama;S. Suga;Y. Taguchi;M. Iwama;K. Ohgushi;Y. Tokura