This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.34734/FZJ-2023-03686 in citations.
Please use the identifier: http://dx.doi.org/10.1002/adma.202301441 in citations.
Inducing Single Spin‐Polarized Flat Bands in Monolayer Graphene
Inducing Single Spin‐Polarized Flat Bands in Monolayer Graphene
Due to the fundamental and technological implications in driving the appearance of non-trivial, exotic topological spin textures and emerging symmetry-broken phases, flat electronic bands in 2D materials, including graphene, are nowadays a relevant topic in the field of spintronics. Here, via europi...
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Personal Name(s): | Jugovac, Matteo (Corresponding author) |
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Cojocariu, Iulia / Sánchez-Barriga, Jaime / Gargiani, Pierluigi / Valvidares, Manuel / Feyer, Vitaliy / Blügel, Stefan / Bihlmayer, Gustav / Perna, Paolo (Corresponding author) | |
Contributing Institute: |
Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Advanced materials, 35 (2023) 38, S. 2301441 |
Imprint: |
Weinheim
Wiley-VCH
2023
|
DOI: |
10.34734/FZJ-2023-03686 |
DOI: |
10.1002/adma.202301441 |
Document Type: |
Journal Article |
Research Program: |
Strukturinversionsasymmetrische Materie und Spin-Orbit-Phänomene mittels ab initio (C01) Topological Matter |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/adma.202301441 in citations.
Due to the fundamental and technological implications in driving the appearance of non-trivial, exotic topological spin textures and emerging symmetry-broken phases, flat electronic bands in 2D materials, including graphene, are nowadays a relevant topic in the field of spintronics. Here, via europium doping, single spin-polarized bands are generated in monolayer graphene supported by the Co(0001) surface. The doping is controlled by Eu positioning, allowing for the formation of a-valley localized single spin-polarized low-dispersive parabolic band close to the Fermi energy when Eu is on top, and of a π* flat band with single spin character when Eu is intercalated underneath graphene. In the latter case, Eu also induces a bandgap opening at the Dirac point while the Eu 4f states act as a spin filter, splitting the π band into two spin-polarized branches. The generation of flat bands with single spin character, as revealed by the spin- and angle-resolved photoemission spectroscopy (ARPES) experiments, complemented by density functional theory (DFT) calculations, opens up new pathways toward the realization of spintronic devices exploiting such novel exotic electronic and magnetic states. |