TY - JOUR

T1 - Origin of Giant Rashba Effect in Graphene on Pt/SiC

AU - Rybkina, Anna A.

AU - Gogina, Alevtina A.

AU - Tarasov, Artem V.

AU - Xin, Ye

AU - Voroshnin, Vladimir Yu.

AU - Pudikov, Dmitrii A.

AU - Klimovskikh, Ilya I.

AU - Petukhov, Anatoly E.

AU - Bokai, Kirill A.

AU - Yuan, Chengxun

AU - Zhou, Zhongxiang

AU - Shikin, Alexander M.

AU - Rybkin, Artem G.

PY - 2023/11/12

Y1 - 2023/11/12

N2 - Intercalation of noble metals can produce giant Rashba-type spin–orbit splittings in graphene. The spin–orbit splitting of more than 100 meV has yet to be achieved in graphene on metal or semiconductor substrates. Here, we report the p-type graphene obtained by Pt intercalation of zero-layer graphene on SiC substrate. The spin splitting of ∼200 meV was observed at a wide range of binding energies. Comparing the results of theoretical studies of different models with the experimental ones measured by spin-ARPES, XPS and STM methods, we concluded that inducing giant spin–orbit splitting requires not only a relatively close distance between graphene and Pt layer but also the presence of graphene corrugation caused by a non-flat Pt layer. This makes it possible to find a compromise between strong hybridization and increased spin–orbit interaction. In our case, the Pt submonolayer possesses nanometer-scale lateral ordering under graphene.

AB - Intercalation of noble metals can produce giant Rashba-type spin–orbit splittings in graphene. The spin–orbit splitting of more than 100 meV has yet to be achieved in graphene on metal or semiconductor substrates. Here, we report the p-type graphene obtained by Pt intercalation of zero-layer graphene on SiC substrate. The spin splitting of ∼200 meV was observed at a wide range of binding energies. Comparing the results of theoretical studies of different models with the experimental ones measured by spin-ARPES, XPS and STM methods, we concluded that inducing giant spin–orbit splitting requires not only a relatively close distance between graphene and Pt layer but also the presence of graphene corrugation caused by a non-flat Pt layer. This makes it possible to find a compromise between strong hybridization and increased spin–orbit interaction. In our case, the Pt submonolayer possesses nanometer-scale lateral ordering under graphene.

UR - https://www.mdpi.com/2073-8994/15/11/2052

UR - https://www.mendeley.com/catalogue/4cb18719-5cc9-34c1-b173-f2e30927d31f/

U2 - https://doi.org/10.3390/sym15112052

DO - https://doi.org/10.3390/sym15112052

M3 - Article

VL - 15

JO - Symmetry

JF - Symmetry

SN - 2073-8994

IS - 11

M1 - 2052

ER -