Surface-state engineering for nonlinear charge and spin photocurrent generation
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866912281516834816 |
|---|---|
| author | Sivianes, Javier Garcia-Goiricelaya, Peio Hernangómez-Pérez, Daniel Ibañez-Azpiroz, Julen |
| author_facet | Sivianes, Javier Garcia-Goiricelaya, Peio Hernangómez-Pérez, Daniel Ibañez-Azpiroz, Julen |
| contents | We systematically explore a pathway for generating nonlinear charge and spin photocurrents using spin-orbit-split surface states. This mechanism enables net charge and spin flow along the surface plane even in centrosymmetric bulk environments like the Rashba prototype Au(111), where we establish the key principles by combining model predictions with density functional calculations. We further identify the Tl/Si(111) surface, characterized by strong non-Rashba spin-orbit coupling, as a prime candidate for experimental validation; with slight doping, it develops metallic spin-orbit-split states featuring remarkable relativistic properties while the bulk remains semiconducting. Our non-linear simulations reveal distinct angular signatures and magnitudes comparable to bulk ferroelectrics, highlighting the potential of surface-state photocurrents for low-bias optoelectronic applications. Moreover, the intricate spin polarization of surface states opens new possibilities as a nonlinear spin filter, providing a far more versatile platform than the spin Hall effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_14360 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Surface-state engineering for nonlinear charge and spin photocurrent generation Sivianes, Javier Garcia-Goiricelaya, Peio Hernangómez-Pérez, Daniel Ibañez-Azpiroz, Julen Mesoscale and Nanoscale Physics We systematically explore a pathway for generating nonlinear charge and spin photocurrents using spin-orbit-split surface states. This mechanism enables net charge and spin flow along the surface plane even in centrosymmetric bulk environments like the Rashba prototype Au(111), where we establish the key principles by combining model predictions with density functional calculations. We further identify the Tl/Si(111) surface, characterized by strong non-Rashba spin-orbit coupling, as a prime candidate for experimental validation; with slight doping, it develops metallic spin-orbit-split states featuring remarkable relativistic properties while the bulk remains semiconducting. Our non-linear simulations reveal distinct angular signatures and magnitudes comparable to bulk ferroelectrics, highlighting the potential of surface-state photocurrents for low-bias optoelectronic applications. Moreover, the intricate spin polarization of surface states opens new possibilities as a nonlinear spin filter, providing a far more versatile platform than the spin Hall effect. |
| title | Surface-state engineering for nonlinear charge and spin photocurrent generation |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.14360 |