TY - JOUR
T1 - Spin-Polarized Semiconducting Band Structure of Monolayer Graphene on Ni (111)
AU - Zhang, Yu
AU - Sui, Xuelei
AU - Ma, Dong Lin
AU - Bai, Ke Ke
AU - Duan, Wenhui
AU - He, Lin
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/11/19
Y1 - 2018/11/19
N2 - The magnetic properties of graphene have attracted much attention for more than a decade. Recent studies have shown that adatoms or atomic vacancies in graphene could exhibit localized magnetic moments. However, a macroscopic spin-polarized semiconducting band structure has never been experimentally realized in graphene. Here, we demonstrate that a graphene monolayer, hybridized with an underlying Ni(111) substrate, exhibits a spin-polarized semiconducting state even at room temperature. Our spin-polarized scanning tunneling microscopy (STM) experiments, complemented by first-principles calculations, explicitly demonstrate that the interaction between graphene and the Ni substrate generates a large gap in graphene and simultaneously leads to a relative shift between majority- and minority-spin bands. Consequently, the graphene sheet on the Ni substrate exhibits a spin-polarized gap with an energy of several tens of meV even at room temperature.
AB - The magnetic properties of graphene have attracted much attention for more than a decade. Recent studies have shown that adatoms or atomic vacancies in graphene could exhibit localized magnetic moments. However, a macroscopic spin-polarized semiconducting band structure has never been experimentally realized in graphene. Here, we demonstrate that a graphene monolayer, hybridized with an underlying Ni(111) substrate, exhibits a spin-polarized semiconducting state even at room temperature. Our spin-polarized scanning tunneling microscopy (STM) experiments, complemented by first-principles calculations, explicitly demonstrate that the interaction between graphene and the Ni substrate generates a large gap in graphene and simultaneously leads to a relative shift between majority- and minority-spin bands. Consequently, the graphene sheet on the Ni substrate exhibits a spin-polarized gap with an energy of several tens of meV even at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=85057076262&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.10.054043
DO - 10.1103/PhysRevApplied.10.054043
M3 - Article
AN - SCOPUS:85057076262
SN - 2331-7019
VL - 10
JO - Physical Review Applied
JF - Physical Review Applied
IS - 5
M1 - 054043
ER -