Photoemission study on a quantum critical Yb-based Kondo system
Project/Area Number |
23840039
|
Research Category |
Grant-in-Aid for Research Activity Start-up
|
Allocation Type | Single-year Grants |
Research Field |
Condensed matter physics II
|
Research Institution | Tokyo University of Science |
Principal Investigator |
OKAWA Mario 東京理科大学, 理学部, 助教 (50609302)
|
Project Period (FY) |
2011 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | 強相関電子系 / 重い電子系 / 価数揺動 / 量子臨界点 / 光電子分光 / 価数謡動 |
Research Abstract |
In a heavy fermion α-YbAlB4, unconventional quantum criticality and antiferromagnetic order can be induced by a few % Al-Fe substitution. To clarify the nature of this quantum criticality in the α-Yb(Al,Fe)B4system, we investigate temperature- and Fe-doping-dependence of the Yb valence, which reflects heavy-electron and magnetic states, in detail using hard x-ray photoemission spectroscopy. As a result, we found the sharp crossover at the quantum critical region in the Fe-doping dependence of the Yb valence and its characteristic temperature of ~100 K.
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Report
(3 results)
Research Products
(35 results)
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[Journal Article] Electronic structure of hole-doped delafossite oxides CuCr_1-_xMg_xO_22013
Author(s)
T. Yokobori, M. Okawa, K. Konishi, R. Takei, K. Katayama, S. Oozono, T. Shinmura, T. Okuda, H. Wadati, E. Sakai, K. Ono, H. Kumigashira, M. Oshima, T. Sugiyama, E. Ikenaga, N. Hamada, and T. Saitoh
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Journal Title
Phys. Rev. B
Volume: 87
Issue: 19
Pages: 195124-195124
DOI
Related Report
Peer Reviewed
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[Journal Article] Two-Fermi-Surface Superconducting State and a Nodal d-Wave Energy Gap of the Electron-Doped Sm1.85Ce0.15CuO4-□ Cuprate Superconductor2011
Author(s)
A.F.Santander-Syro, M.Ikeda, T.Yoshida, A.Fujimori, K.Ishizaka, M.Okawa, S.Shin, B.Liang, A.Zimmers, R.L.Greene, N.Bontemps
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Journal Title
Phys.Rev.Lett.
Volume: 106
Issue: 19
Pages: 197002-197002
DOI
Related Report
Peer Reviewed
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