| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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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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