Nodal-line Dirac semimetals are a novel class of quantum materials, where valence and conduction bands form linearly dispersing cones that are degenerate along a closed line in the Brillouin zone. Recently, single-layer Cu2Si was proposed as the first two-dimensional nodal-line semimetal. Here we demonstrate the formation of Cu2Si encapsulated between a graphene layer and a Cu(1 1 1) substrate, and investigate the electronic states of this heterostructure. We find that the Cu2Si-graphene interaction is negligible and show that, as a result, the graphene layer is electronically decoupled from the substrate.

The growth and band structure of a graphene-encapsulated two-dimensional nodal line semimetal: Cu2Si

Crepaldi A.;
2019

Abstract

Nodal-line Dirac semimetals are a novel class of quantum materials, where valence and conduction bands form linearly dispersing cones that are degenerate along a closed line in the Brillouin zone. Recently, single-layer Cu2Si was proposed as the first two-dimensional nodal-line semimetal. Here we demonstrate the formation of Cu2Si encapsulated between a graphene layer and a Cu(1 1 1) substrate, and investigate the electronic states of this heterostructure. We find that the Cu2Si-graphene interaction is negligible and show that, as a result, the graphene layer is electronically decoupled from the substrate.
Arpes
Cu
2
si
Nodal-line
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1185648
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