Probing the magnetism of topological end-states in 5-armchair graphene nanoribbons
arXiv:1912.12094 · doi:10.1021/acsnano.9b10191
Abstract
We extensively characterize the electronic structure of ultra-narrow graphene nanoribbons (GNRs) with armchair edges and zig-zag termini that have 5 carbon atoms across their width (5-AGNRs), as synthesised on Au(111). Scanning tunnelling spectroscopy measurements on the ribbons, recorded on both the metallic substrate and a decoupling NaCl layer, show well-defined dispersive bands and in-gap states. In combination with theoretical calculations, we show how these in-gap states are topological in nature and localised at the zig-zag termini of the nanoribbons. Besides rationalising the driving force behind the topological class selection of 5-AGNRs, we also uncover the length-dependent behaviour of these end states which transition from singly occupied spin-split states to a closed-shell form as the ribbons become shorter. Finally, we demonstrate the magnetic character of the end states via transport experiments in a model two-terminal device structure in which the ribbons are suspended between the scanning probe and the substrate that both act as leads.
References in corpus (5)
- Energy Gaps in Graphene Nanoribbons
- Width-Dependent Band Gap in Armchair Graphene Nanoribbons Reveals Fermi Level Pinning on Au(111)
- Formation of dispersive hybrid bands at an organic-metal interface
- Electronic Band Dispersion of Graphene Nanoribbons via Fourier-Transformed Scanning Tunneling Spectroscopy
- Inducing Kondo Screening of Vacancy Magnetic Moments in Graphene with Gating and Local Curvature
Cited by in corpus (25)
- Topological phase transition in chiral graphene nanoribbons: from edge bands to end states
- Magnetism of topological boundary states induced by boron substitution in graphene nanoribbons
- Coupled spin states in armchair graphene nanoribbons with asymmetric zigzag edge extensions
- Magnetic Interactions Between Radical Pairs in Chiral Graphene Nanoribbons
- Addressing electron spins embedded in metallic graphene nanoribbons
- Imprinting Tunable -Magnetism in Graphene Nanoribbons via Edge Extensions
- Unveiling and Manipulating Hidden Symmetries in Graphene Nanoribbons
- Order from a mess: the growth of 5-armchair graphene nanoribbons
- Electrically Induced Dirac Fermions in Graphene Nanoribbons
- Electrically driven singlet-triplet transition in triangulene spin-1 chains
- On-Surface Synthesis of Graphene Nanoribbons on Two-Dimensional Rare Earth-Gold Intermetallic Compounds
- Electronic Decoupling of Polyacenes from the Underlying Metal Substrate by sp3 Carbon Atoms
- On-surface synthesis and characterization of Teranthene and Hexanthene: Ultrashort graphene nanoribbons with mixed armchair and zigzag edges
- Full analytical solution of finite-length armchair/zigzag nanoribbons
- Current-induced one-dimensional diffusion of Co ad-atoms on graphene nanoribbons
- Tunable Current Rectification Through a Designer Graphene Nanoribbon
- Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet
- Inducing a topological transition in graphene nanoribbons superlattices by external strain
- Effect of electronic correlation on topological end-states in finite-size graphene nanoribbons
- Ultra-Fast All-Electrical Universal Nano-Qubits
- Robust correlated magnetic moments in end-modified graphene nanoribbons
- Length-independent quantum transport through topological band states of graphene nanoribbons
- Graphene-based quantum heterospin graphs
- Creating quantum spin chains through edge reconstruction in pure graphene armchair nanoribbons towards ballistic spin transport
- Magnetically tuned topological phase in graphene nanoribbon heterojunctions