286 citations · 506 across the 12 of their papers we have counts for
12 papers
The multiconfigurational ground state of a diradicaloid characterized at the atomic scale
Elia Turco, Lara Tejerina, Gonçalo Catarina +5
We report the tip-induced generation and scanning probe characterization of a singlet diradicaloid, consisting of two phenalenyl units connected by an sp-hybridized C chain,…
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…
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…
Beyond spin models in orbitally-degenerate open-shell nanographenes
J. C. G. Henriques, D. Jacob, A. Molina-Sánchez +3
The study of open-shell nanographenes has relied on a paradigm where spins are the only low-energy degrees of freedom. Here we show that some nanographenes can host low-energy exci…
Density-matrix renormalization group: a pedagogical introduction
G. Catarina, Bruno Murta
The physical properties of a quantum many-body system can, in principle, be determined by diagonalizing the respective Hamiltonian, but the dimensions of its matrix representation…
Theory of triangulene two-dimensional crystals
R. Ortiz, G. Catarina, J. Fernández-Rossier
Equilateral triangle-shaped graphene nanoislands with a lateral dimension of benzene rings are known as triangulenes. Individual triangulenes are open-shell molecules…
Observation of fractional edge excitations in nanographene spin chains
Shantanu Mishra, Goncalo Catarina, Fupeng Wu +9
Fractionalization is a phenomenon in which strong interactions in a quantum system drive the emergence of excitations with quantum numbers that are absent in the building blocks. O…
Magneto-optical response of chromium trihalide monolayers: chemical trends
A. Molina-Sánchez, G. Catarina, D. Sangalli +1
Chromium trihalides (CrI, CrBr and CrCl) form a prominent family of isostructural insulating layered materials in which ferromagnetic order has been observed down to th…
Twisted bilayer graphene: low-energy physics, electronic and optical properties
G. Catarina, B. Amorim, Eduardo V. Castro +2
Van der Waals (vdW) heterostructures ---formed by stacking or growing two-dimensional (2D) crystals on top of each other--- have emerged as a new promising route to tailor and engi…
Optical orientation with linearly polarized light in transition metal dichalcogenides
G. Catarina, J. Have, J. Fernández-Rossier +1
We study the optical properties of semiconducting transition metal dichalcogenide monolayers under the influence of strong out-of-plane magnetic fields, using the effective massive…
Monolayer transition metal dichalcogenides in strong magnetic fields: Validating the Wannier model using a microscopic calculation
J. Have, G. Catarina, T. G. Pedersen +1
Using an equation of motion (EOM) approach, we calculate excitonic properties of monolayer transition metal dichalcogenides (TMDs) perturbed by an external magnetic field. We compa…