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Systematic investigations of transient response of nuclear spins in the presence of polarized electrons
| Title: | Systematic investigations of transient response of nuclear spins in the presence of polarized electrons |
| Authors: | Rasly, Mohmoud Browse this author | | Lin, Zhichao Browse this author | | Uemura, Tetsuya Browse this author →KAKEN DB |
| Issue Date: | 13-Nov-2017 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 96 |
| Issue: | 18 |
| Start Page: | 184415 |
| Publisher DOI: | 10.1103/PhysRevB.96.184415 |
| Abstract: | We electrically probed the transient response of nuclear spins in an n-GaAs channel by performing Hanle signal and spin-valve signal measurements on an all-electrical spin-injection device having a half-metallic spin source of Co2MnSi. Furthermore, we simulated the Hanle and spin-valve signals by using the time evolution of nuclear-spin polarization under the presence of polarized electron spins by taking both T-1e and T-1 into consideration, where T-1e(-1) is the polarization rate of nuclear spins through the transfer of angular momentum from polarized electron spins and T-1(-1) is the depolarization rate of nuclear spins through the interaction with the lattice. The simulation results reproduced our experimental results on all the nuclear-spin-related phenomena appearing in the Hanle and spin-valve signals at different measurement conditions, providing quantitative explanation for the transient response of nuclear spins in GaAs to a change in magnetic fields and an estimate of the time scales of T-1e and T-1. These experimental and simulated results will deepen the understanding of nuclear-spin dynamics in semiconductors. |
| Rights: | ©2017 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/67835 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 植村 哲也
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