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論文

Real-time observation of charge-spin cooperative dynamics driven by a nonequilibrium phonon environment

黒山 和幸*; 松尾 貞茂*; 村本 丈*; 藪中 俊介; Velentin, S. R.*; Ludwig, A.*; Wieck, A. D.*; 都倉 康弘*; 樽茶 清悟*

Physical Review Letters, 129(9), p.095901_1 - 095901_6, 2022/08

 被引用回数:1 パーセンタイル:48.58(Physics, Multidisciplinary)

We report on experimental observations of charge-spin cooperative dynamics of two-electron states in a GaAs double quantum dot located in a nonequilibrium phonon environment. When the phonon energy exceeds the lowest excitation energy in the quantum dot, the spin-flip rate of a single electron strongly enhances. In addition, originated from the spatial gradient of phonon density between the dots, the parallel spin states become more probable than the antiparallel ones. These results indicate that spin is essential for further demonstrations of single-electron thermodynamic systems driven by phonons, which will greatly contribute to understanding of the fundamental physics of thermoelectric devices.

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