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説明:

We report that the spin vector of photoelectrons emitted from an atomic layer Pb grown on a germanium substrate [Pb/Ge(111)] can be controlled using an electric field of light. The spin polarization of photoelectrons excited by a linearly polarized light is precisely investigated by spin- and angle-resolved photoemission spectroscopy. The spin polarization of the photoelectrons observed in the mirror plane reverses between p- and s-polarized lights. Considering the dipole transition selection rule, the surface state of Pb/Ge(111) is represented by a linear combination of symmetric and asymmetric orbital components coupled with spins in mutually opposite directions. The spin direction of the photoelectrons is different from that of the initial state when the electric field vector of linearly polarized light deviates from p- or s-polarization conditions. The quantum interference in the photoexcitation process can determine the direction of the spin vector of photoelectrons.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: spin polarization, surface state, spin-orbit coupling, quantum interference, spin- and angle-resolved photoemission spectroscopy, Pb/Ge(111)

刊行年月日: 2024-10-04

出版者: Oxford University Press (OUP)

掲載誌:

• Microscopy (ISSN: 00220744) vol. 73 issue. 5 p. 439-445

研究助成金:

• Japan Society for the Promotion of Science JP21K04633, JP21H04652, JP22H01761
• Iketani Science and Technology Foundation
• Innovative Science and Technology Initiative for Security, ATLA JPJ004596
• Japan Society for the Promotion of Science JP21K04633, JP21H04652, JP22H01761
• Iketani Science and Technology Foundation
• Innovative Science and Technology Initiative for Security, ATLA JPJ004596

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1093/jmicro/dfae021

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更新時刻: 2024-10-09 08:30:42 +0900

MDRでの公開時刻: 2024-10-09 08:30:42 +0900