Microscopic investigation of insulator-metal transitions in rare-earth compounds
Project/Area Number |
26800193
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
|
Research Institution | University of Hyogo |
Principal Investigator |
|
Project Period (FY) |
2014-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
Keywords | 希土類化合物 / サマリウム / 絶縁体-金属転移 / 圧力 / 核磁気共鳴 / 絶縁体金属転移 / サマリウム化合物 / 希土類元素 / 金属-絶縁体転移 / 強相関電子系 |
Outline of Final Research Achievements |
Pressure-induced insulator-metal transitions in SmS and SmB6 have been studied since these properties were reported in 1960’s. However, there remains several issues still unsolved probably due to lack of microscopic study under pressure. We have performed NMR measurement on these compounds to investigate the effect of pressure on the electronic state from microscopic point of view. As for SmS, we prepared the NMR active 33S enriched sample and performed the first NMR measurement of it. Notable results about SmS are as follows. (i) 4f electrons are localized at high temperatures where Sm ion was reported to have intermediate valence. (ii) a magnetic ordering was observed as a change of 33S NMR spectrum below 18 K and above 2 GPa. (iii) The magnetic ordering regime in the sample increases with pressure and decreasing temperature at the expense of the paramagnetic regime.
|
Report
(3 results)
Research Products
(20 results)
-
[Journal Article] NMR studies on polyphosphide Ce6Ni6P172016
Author(s)
T. Koyama, H. Yamada, K. Ueda, T. Mito, Y. Aoyama, T. Nakano, and N. Takeda
-
Journal Title
Journal of Physics: Conference Series
Volume: 683
Pages: 0120271-4
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
-
-
[Journal Article] Magnetic and Electronic Properties of URu2Si2 Revealed by Comparison with Nonmagnetic References ThRu2Si2 and LaRu2Si22015
Author(s)
N. Emi, R. Hamabata, D. Nakayama, T. Miki, T. Koyama, K. Ueda, T. Mito, Y. Kohori, Y. Matsumoto, Y. Haga, E. Yamamoto, Z. Fisk, and N. Tsujii,
-
Journal Title
J. Phys. Soc. Jpn.
Volume: 84
Issue: 6
Pages: 0637021-4
DOI
NAID
Related Report
Peer Reviewed / Acknowledgement Compliant
-
-
-
[Journal Article] NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP2014
Author(s)
T. Mito, K. Nishitani, T. Koyama, H. Muta, T. Maruyama, G. Pristas, K. Ueda, T. Kohara, A. Mitsuda, M. Sugishima, and H. Wada,
-
Journal Title
Phys. Rev. B 90
Volume: 90
Issue: 19
Pages: 195106-195106
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
-
-
-
[Presentation] X線吸収分光・NMR測定による近藤半導体SmB6の高圧下電子状態2016
Author(s)
江見直哉, 小山岳秀, 西山功兵, 上田光一, 水戸毅, 水牧仁一朗, 河村直己, 石松直樹, 北川健太郎, 加賀山朋子, H. Nguyen, 清水克哉, 伊賀文俊, N. Shitsevalova
Organizer
日本物理学会 第71回年次大会(2016年)
Place of Presentation
東北学院大学(宮城県仙台市)
Year and Date
2016-03-21
Related Report
-
[Presentation] NMR study of EuNi2Si2 with trivalent Eu2015
Author(s)
T. Koyama, F. Ueyama, T. Maruyama, K. Ueda, T. Mito, A. Mitsuda, and H. Wada
Organizer
International Workshop on Itinerant-Electron Magnetism
Place of Presentation
京都大学(京都府京都市)
Year and Date
2015-09-26
Related Report
Int'l Joint Research
-
-
[Presentation] NMRからみたSmSの圧力効果2015
Author(s)
小山岳秀, 山田陽彦, 上田光一, 水戸毅, 芳賀芳範
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学(大阪府吹田市)
Year and Date
2015-09-19
Related Report
-
[Presentation] 小さな半導体ギャップを持つSm系化合物における電子状態 SmB6の価数・磁性・ギャップ2015
Author(s)
水戸毅, 江見直哉, 西山功兵, 谷口太一, 小山岳秀, 上田光一, 小原孝夫, 水牧仁一朗, 河村直己, 石松直樹, 北川健太郎, 小山内湧人, 林健人, 伊賀文俊, N. Shitsevalova
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学(大阪府吹田市)
Year and Date
2015-09-19
Related Report
-
[Presentation] SmSの圧力下NMR測定II2015
Author(s)
山田陽彦, 小山岳秀, 上田光一, 水戸毅, 芳賀芳範
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学(大阪府吹田市)
Year and Date
2015-09-17
Related Report
-
-
[Presentation] SmSの圧力下NMR測定2015
Author(s)
山田陽彦,小山岳秀,上田光一,水戸毅,芳賀芳範
Organizer
日本物理学会 第70回年次大会
Place of Presentation
早稲田大学 (東京都新宿区)
Year and Date
2015-03-22
Related Report
-
-
-
-