| Project/Area Number |
17340096
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Kobe University |
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Principal Investigator |
OKAMURA Hidekazu Kobe University, 理学研究科, ASSOCIATE PROFESSOR (00273756)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥14,870,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥870,000)
Fiscal Year 2007: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2006: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥7,600,000 (Direct Cost: ¥7,600,000)
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| Keywords | HEAVY FERMION / F-ELECTRON / INFRARED SPECTROSCOPY / HIGH PRESSURE / SYNCHROTRON RADIATION / f電子 |
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| Research Abstract |
THE AIM OF THIS RESEARCH PROJECT HAS BEEN THE STUDY OF THE CONDUCTION-F ELECTRON HYBRIDIZED ELECTRONIC STATE, REALIZED IN THE SO-CALLED HEAVY FERMION COMPOUNDS, UNDER HIGH PRESSURE USING INFRARED SPECTROSCOPY TECHNIQUE. TO CARRY OUT THE DIFFICULT INFRARED SPECTROSCOPY OF SMALL SAMPLES MOUNTED IN A PRESSURE GENERTING CELL (DIAMOND ANVIL CELL), A HIGH BRILLIANCE SYNCHROTRON RADIATION WAS USED AS AN INFRARED SOURCE AT THE BEAM LINE BL43IR OF SPRING-8. WE HAVE STUDIED THE EVOLUTION OF INFRARED SPECTRA UNDER HIGH PRESSURE FOR SUCH F ELECIRON COMPOUNDS AS YbA_<12>, YbS, ELEMENTAL Yb, AND CeRu_4Sb_<12> SO FAR. WE HAVE OBSERVED LARGE CHANGES IN THEIR INFRARED SPECTRA AS A FUNCTION OF EXTERNAL PRESSURE. WE HAVE INTERPRETED THE PRESSURE-INDUCED SPECTRAL CHANGES USING THE SO-CALLED C-F HYBRIDIZED BAND MODEL. WE PLAN TO FURTHER EXTEND OUR STUDIES OF F ELECTRON SYSTEMS UNDER HIGH PRESSURE IN THE FUTURE. IN ADDITION TO THE PRESSURE STUDIES, WE HAVE ALSO CONTINUED OUR WORK OF F ELECTRON SYSTEMS AT AMBIENT PRESSURE. WE HAVE OBSERVED A UNIVERSAL RELATION REGARDING THE OPTICAL CONDUCTIVITY OF MANY Ce AND Yb COMPOUNDS. THIS IS REMARKABLE SINCE SUCH A UNIVERSAL RELATION HAD BEEN KNOWN ONLY FOR THEIR GROUND STATE PROPETIES, KNOWN AS KADOWAKI-WOODS RELATION
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