2016 Fiscal Year Final Research Report
Study of exciton condensation in the visinity of insulator-to-metal transition
| Project/Area Number |
26870265
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
Condensed matter physics I
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 強相関電子系 / 金属絶縁体転移 / 励起子絶縁体 |
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| Outline of Final Research Achievements |
Experimental elucidation of the Bose-Einstein condensation of an exciton (bound state of an electron and a hole) with infinite lifetime is one of a challenging topic in condensed matter physics. In this study, we focus on SmS which is a prototypical compound that exhibits pressure-induced insulator-to-metal transition in order to elucidate the possibility of the exciton condensation.
Combining with transport and angle-resolved photoemission spectroscopy measurement, we have observed an insulator-to-metal transition in the Black phase which has been thought to be an insulator phase so far. We have also found a clear non-linear conduction phenomenon including negative differential resistance in the vicinity of the transition. These results give important insight into further study of exciton condensation.
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| Free Research Field |
物性物理学
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