Journal
NANO LETTERS
Volume 21, Issue 7, Pages 3177-3183Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00420
Keywords
Spin photocurrents; Topological insulators; Two-dimensional materials; Spin-orbit coupling
Categories
Funding
- ANID (Chile) PFCHA, DOCTORADO NACIONAL/2017 [21171229]
- FondeCyT (Chile) [1170917]
- EU Horizon 2020 research and innovation program under the MarieSklodowska-Curie Grant [873028]
- Abdus Salam International Centre for Theoretical Physics
- Simons Foundation
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Secretaria de Ciencia y Tecnologia de la Universidad Nacional de Cordoba (SECYT-UNC)
- Marie Curie Actions (MSCA) [873028] Funding Source: Marie Curie Actions (MSCA)
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Researchers studied the interaction among laser illumination, spin, and topology in a two-dimensional material with spin-orbit coupling using Floquet scattering theory and atomistic models, showing how laser illumination can disrupt topological edge states and generate pure spin photocurrents and spin-polarized charge photocurrents. This paves the way for the generation and control of spin-polarized photocurrents.
Harnessing the unique features of topological materials for the development of a new generation of topological based devices is a challenge of paramount importance. Using Floquet scattering theory combined with atomistic models we study the interplay among laser illumination, spin, and topology in a two-dimensional material with spin-orbit coupling. Starting from a topological phase, we show how laser illumination can selectively disrupt the topological edge states depending on their spin. This is manifested by the generation of pure spin photocurrents and spin-polarized charge photocurrents under linearly and circularly polarized laser illumination, respectively. Our results open a path for the generation and control of spin-polarized photocurrents.
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