Development of new calculation techniques for the high-energy spectroscopy and search for novel orbital orders
| Project/Area Number |
25400377
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Hiroshima University |
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Principal Investigator |
Tanaka Arata 広島大学, 先端物質科学研究科, 助教 (70253052)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 強相関電子系 / 軌道秩序 / 高エネルギー分光 / 動的平均場理論 / 共鳴軟X線弾性散乱 / デュアルフェルミオン法 / 金属絶縁体転移 / ハバードモデル / 電子相関 / 動平均場近似 / 動的平均場近似 / Dual Fermion法 / 軟X線共鳴回折 / 遷移金属化合物 / 軌道縮退 |
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| Outline of Final Research Achievements |
Strongly correlated electron systems have long been studied because of their fascinating features such as high-temperature superconductance or magnetism. In recent years, the dynamical mean-field theory (DMFT) has attracted attentions as it can render accurate descriptions of such strongly correlated systems. In this study, we developed new calculation techniques and a computer program, which can calculate spectral functions as well as ground state properties of strongly correlated electron systems accurately, based on the dual-fermion method, an extension of DMFT. We investigated the metal-insulator transition in the Hubbard model, which is one of the fundamental models of strongly correlated electron systems. We also discussed soft x-ray resonant diffraction and high-energy spectroscopy as a means to observe orbital orders and conducted analyses of the spectra in materials with orbital orders.
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Report
(4 results)
Research Products
(12 results)
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[Journal Article] Evidence for Γ8 Ground-State Symmetry of Cubic YbB12 Probed by Linear Dichroism in Core-Level Photoemission2015
Author(s)
Yuina Kanai, Takeo Mori, Sho Naimen, Kohei Yamagami, Hidenori Fujiwara, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Takayuki Kiss, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Fumitoshi Iga, and Akira Sekiyama
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Journal Title
J. Phys. Soc. Jpn.
Volume: 84
Issue: 7
Pages: 073705-073705
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] Analysis of charge and orbital order in Fe3O4 by Fe L2,3 resonant x-ray diffraction2013
Author(s)
A. Tanaka, F. Chang, M. Buchholz, C. Trabant, E. Schierle, J. Schlappa, D. Schmitz, H. Ott, P. Metcalf, L. H. Tjeng, and C. Schuessler-Langeheine
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Journal Title
Physical Review B
Volume: 88
Issue: 19
DOI
Related Report
Peer Reviewed
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