2017 Fiscal Year Final Research Report
Observation of spinon spin currents
| Project/Area Number |
16K13827
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo (2017)
Tohoku University (2016) |
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Principal Investigator |
Shiomi Yuki 東京大学, 大学院工学系研究科(工学部), 特任講師 (10633969)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | スピントロニクス / スピン流 / 量子スピン系 / スピン液体 / スピノン / マヨラナ粒子 / キタエフ模型 |
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| Outline of Final Research Achievements |
In this research, we aimed at experimental demonstration of novel spin currents using spin excitations peculiar to quantum spin liquid states: spinon and Majorana particle. In a typical one-dimensional quantum spin-liquid Sr2CuO3 where the existence of spinon excitation has been established experimentally, we showed by using the spin Seebeck effect that application of a temperature gradient to Sr2CuO3 generates spinon spin currents. Furthermore, in a Kitaev spin liquid material RuCl3 which has attracted much attention in the condensed matter physics in the last few years, we observed the flow of Majorana particles due to a temperature gradient in thermal conductivity measurements.
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| Free Research Field |
スピントロニクス
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