1.5k citations · 5k across the 53 of their papers we have counts for
57 papers
Ultra-high vacuum Raman platform for in situ characterization of graphene nanoribbons
Jeong Ha Hwang, Amogh Kinikar, Lukas Rotach +9
Atomically precise graphene nanoribbons (GNRs) exhibit tunable electronic and magnetic properties governed by edge topology and finite-size effects, which make them versatile platf…
One-dimensional carbon nanostructures with periodic graphitic nitrogen substitution
Nicolò Bassi, Shantanu Mishra, Zheng Zhang +8
Heteroatom substitution is a powerful route to tune the chemical and electronic properties of carbon nanomaterials. In particular, replacement of an sp2 hybridized carbon atom in t…
Learning Inhomogeneous Heisenberg Hamiltonians in Nanographene Spin Chains
Greta Lupi, Saketh Ravuri, Chenxiao Zhao +9
Inferring microscopic Hamiltonians from experimental data is a central challenge in quantum materials and quantum simulation. In low-dimensional spin systems, exchange interactions…
Engineering Ferrimagnetic Interactions in Molecular Quantum Systems
Elia Turco, Fupeng Wu, Annika Bernhardt +6
Achieving long-range ferrimagnetic order in purely organic systems remains a major challenge in molecular magnetism. Here we report the synthesis and characterization of heterospin…
Observation of the Ferromagnetic Kondo Effect
Elia Turco, Nils Krane, Hongyan Chen +5
The quest for quantum ground states beyond the conventional Fermi-liquid paradigm remains a central challenge in many-body physics. The ferromagnetic Kondo effect represents a part…
Optimized Synthesis and Device Integration of Long 17-Atom-Wide Armchair Graphene Nanoribbons
Jeong Ha Hwang, Nicolò Bassi, Mayada Fadel +15
Seventeen-carbon-atom-wide armchair graphene nanoribbons (17-AGNRs) are promising candidates for high-performance electronic devices due to their narrow electronic bandgap. Atomic…
Atomic-scale imaging of graphene nanoribbons on graphene after polymer-free substrate transfer
Amogh Kinikar, Feifei Xiang, Lucia Palomino Ruiz +12
On-surface synthesis enables the fabrication of atomically precise graphene nanoribbons (GNRs) with properties defined by their shape and edge topology. While this bottom-up approa…
On determining the energy dispersion of spin excitations with scanning tunneling spectroscopy
J. C. G. Henriques, Chenxiao Zhao, G. Catarina +3
Conventional methods to measure the dispersion relations of collective spin excitations involve probing bulk samples with particles such as neutrons, photons or electrons, which ca…
Vibrational excitations in magnetic triangular nanographenes
Nils Krane, Elia Turco, Annika Bernhardt +3
Inelastic electron tunneling spectroscopy (IETS) is a powerful measurement technique often used in scanning tunneling spectroscopy to probe excited states of various nanostructures…
Gapless spin excitations in nanographene-based antiferromagnetic spin-1/2 Heisenberg chains
Chenxiao Zhao, Lin Yang, João C. G. Henriques +8
Haldane's seminal work established two fundamentally different types of excitation spectra for antiferromagnetic Heisenberg quantum spin chains: gapped excitations in integer-spin…
The role of precursor coverage in the synthesis and substrate transfer of graphene nanoribbons
Rimah Darawish, Oliver Braun, Klaus Muellen +4
Graphene nanoribbons (GNRs) with atomically precise widths and edge topologies have well-defined band gaps that depend on ribbon dimensions, making them ideal for room-temperature…
Conformational tuning of magnetic interactions in coupled nanographenes
Gonçalo Catarina, Elia Turco, Nils Krane +6
Phenalenyl (CH) is an open-shell spin- nanographene. Using scanning tunneling microscopy (STM) inelastic electron tunneling spectroscopy (IETS), covalently-bonded p…
Magnetic Excitations in Ferromagnetically Coupled Spin-1 Nanographenes
Elia Turco, Fupeng Wu, Gonçalo Catarina +5
In the quest for high-spin building blocks to form covalently bonded 1D or 2D materials with controlled magnetic interactions, -electron magnetism provides an ideal framework to…
Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation
Amogh Kinikar, Thorsten G. Englmann, Marco Di Giovannantonio +14
Atomically precise graphene nanoribbons (GNRs) have a wide range of electronic properties that depend sensitively on their chemical structure. Several types of GNRs have been synth…
Tunable topological phases in nanographene-based spin-1/2 alternating-exchange Heisenberg chains
Chenxiao Zhao, Gonçalo Catarina, Jin-Jiang Zhang +8
Unlocking the potential of topological order within many-body spin systems has long been a central pursuit in the realm of quantum materials. Despite extensive efforts, the quest f…
Demonstrating Kondo behavior by temperature-dependent scanning tunneling spectroscopy
Elia Turco, Markus Aapro, Somesh C. Ganguli +9
The Kondo effect describes the scattering of conduction electrons by magnetic impurities, manifesting as an electronic resonance at the Fermi energy with a distinctive temperature…
Tailoring magnetism of nanographenes via tip-controlled dehydrogenation
Chenxiao Zhao, Qiang Huang, Leoš Valenta +10
Atomically precise graphene nanoflakes, called nanographenes, have emerged as a promising platform to realize carbon magnetism. Their ground state spin configuration can be anticip…
Charge State-Dependent Symmetry Breaking of Atomic Defects in Transition Metal Dichalcogenides
Feifei Xiang, Lysander Huberich, Preston A. Vargas +11
The functionality of atomic quantum emitters is intrinsically linked to their host lattice coordination. Structural distortions that spontaneously break the lattice symmetry strong…
On-surface synthesis and characterization of Teranthene and Hexanthene: Ultrashort graphene nanoribbons with mixed armchair and zigzag edges
Gabriela Borin Barin, Marco Di Giovannantonio, Thorsten G. Lohr +8
Graphene nanoribbons (GNRs) exhibit a broad range of physicochemical properties that critically depend on their width and edge topology. While the chemically stable GNRs with armch…
Exchange interactions and intermolecular hybridization in a spin-1/2 nanographene dimer
N. Krane, E. Turco, A. Bernhardt +8
Phenalenyl is a radical nanographene with triangular shape that hosts an unpaired electron with spin S = 1/2. The open-shell nature of phenalenyl is expected to be retained in cova…
Quantifying Alignment and Quality of Graphene Nanoribbons: A Polarized Raman Spectroscopy Approach
Rimah Darawish, Jan Overbeck, Klaus Müllen +4
Graphene nanoribbons (GNRs) are atomically precise stripes of graphene with tunable electronic properties, making them promising for room-temperature switching applications like fi…
MoRe Electrodes with 10-nm Nanogaps for Electrical Contact to Atomically Precise Graphene Nanoribbons
Damian Bouwmeester, Talieh S. Ghiasi, Gabriela Borin Barin +4
Atomically precise graphene nanoribbons (GNRs) are predicted to exhibit exceptional edge-related properties, such as localized edge states, spin polarization, and half-metallicity.…
Platinum contacts for 9-atom-wide armchair graphene nanoribbons
Chunwei Hsu, Michael Rohde, Gabriela Borin Barin +7
Creating a good contact between electrodes and graphene nanoribbons (GNRs) has been a longstanding challenge in searching for the next GNR-based nanoelectronics. This quest require…
Direct observation of the magnetic ground state of the two smallest triangular nanographenes
Elia Turco, Annika Bernhardt, Nils Krane +4
Fusion of three benzene rings in a triangular fashion gives rise to the smallest open-shell graphene fragment, the phenalenyl radical, whose -extension leads to an entire family…