2019年3月4日
Transport of a persistent spin helix drifting transverse to the spin texture
Physical Review B
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- 巻
- 99
- 号
- 12
- 開始ページ
- 125404-1
- 終了ページ
- 125404-6
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.99.125404
- 出版者・発行元
- AMER PHYSICAL SOC
© 2019 American Physical Society. Time-resolved magneto-optic Kerr microscopy measures the effect of in-plane electric fields on the dynamics of a photoexcited spin distribution in a modulation-doped GaAs quantum well. The structure features nearly equal Dresselhaus and Rashba coefficients, such that there is negligible impact of spin-orbit coupling for electrons moving along the [110] or [110] directions. Meanwhile, spin texture emerges for electrons moving in the [110] or [110] directions. The overall spin pattern resembles a persistent spin helix. An in-plane electric field, applied transverse to the spin texture (along the [110] or [110] directions), introduces a drift of the spin packet and additional Larmor precessions, i.e., a marked decrease of the spatial periodicity of the spin pattern. The in-plane electric field also increases the temporal frequency of the evolving spin distribution, which is directly linked to the cubic Dresselhaus spin-orbit coupling term. Moreover, the in-plane field increases the diffusion coefficient by more than an order of magnitude. We attribute this effect to carrier heating and the separation of the photogenerated electron-hole dipole.
- リンク情報
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- DOI
- https://doi.org/10.1103/PhysRevB.99.125404
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000460722900008&DestApp=WOS_CPL
- 共同研究・競争的資金等の研究課題
- 光検出時間分解磁気イメージングで探るナノ構造物理
- 共同研究・競争的資金等の研究課題
- 光検出MRI法によるナノスケールイメージングの物性物理への展開
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85062709132&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85062709132&origin=inward
- ID情報
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- DOI : 10.1103/PhysRevB.99.125404
- ISSN : 2469-9950
- eISSN : 2469-9969
- SCOPUS ID : 85062709132
- Web of Science ID : WOS:000460722900008