Emergent Dirac fermions in graphene and underlying Au monolayer with two-dimensional ferrimagnetism

Abstract

Using angle-resolved photoemission spectroscopy (ARPES) with spin resolution, scanning tunneling microscopy/spectroscopy (STM/STS) and density functional theory (DFT) methods, we study the electronic structure of graphene-covered and bare Au/Co(0001) systems and reveal intriguing features, arising from the ferrimagnetic order in graphene and the underlying gold monolayer. In particular, a spin-polarized Dirac-cone-like state, intrinsically related to the induced magnetization of Au, was discovered at Image ID:d5nr01969a-t1.gif point. We have obtained a good agreement between experiment and theory for bare and graphene-covered Au/Co(0001) and have proven that both Au ferrimagnetism and the Dirac-cone-like band are intimately linked to the triangular loop dislocations present at the Au/Co interface. STM measurements and simulation of the local density of states reveal a magnetic band gap in the electronic structure of graphene for out-of-plane magnetization. This gap is promising for achieving a quantum anomalous Hall state in graphene.

Graphical abstract: Emergent Dirac fermions in graphene and underlying Au monolayer with two-dimensional ferrimagnetism

Supplementary files

Article information

Article type
Paper
Submitted
13 May 2025
Accepted
01 Sep 2025
First published
02 Sep 2025

Nanoscale, 2025, Advance Article

Emergent Dirac fermions in graphene and underlying Au monolayer with two-dimensional ferrimagnetism

A. G. Rybkin, A. V. Tarasov, A. A. Rybkina, V. Yu. Voroshnin, D. A. Estyunin, D. Yu. Usachov, A. E. Petukhov, D. A. Pudikov, A. V. Eryzhenkov, I. I. Klimovskikh, J. Sánchez-Barriga, A. Varykhalov, Y. Kumar, S. Kumar, T. Iwata, K. Kuroda, K. Miyamoto, T. Okuda, K. Shimada, A. S. Frolov, V. S. Stolyarov and A. M. Shikin, Nanoscale, 2025, Advance Article , DOI: 10.1039/D5NR01969A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements