178 citations · 2.2k across the 68 of their papers we have counts for
38 papers · 1 filter
Staggered orbital magnetization from itinerant electrons: orbital antiferro- and ferrimagnetic phases
Lucas L. Lage, Kevin J. U. Vidarte, Tarik P. Cysne +3
Because electronic orbital angular momentum in solids is inherently non-local, its contribution to magnetism is usually cast in terms of a net orbital magnetization. Here, we show…
Multipolar orbital relaxation of the states
Aurélien Manchon, Xiaobai Ning, Chi Sun +3
Using a nonperturbative approach, the relaxation rate of orbital dipolar and quadrupolar moments is computed analytically for the t2g states. In the presence of short-range impurit…
Real-Space Spectral Approach to Orbital Magnetization
Kevin J. U. Vidarte, Henrique P. Veiga, João M. Viana Parente Lopes +4
We present a real-space spectral method for computing the orbital magnetization of crystals. Starting from the commutator form of the orbital magnetization operator, we formulate a…
Orbital Hall effect from orbital magnetic moments of Bloch states: the role of a new correction term
Tarik P. Cysne, Ivo Souza, Tatiana G. Rappoport
We present a rigorous derivation of the matrix elements of the orbital magnetic moment (OMM) of Bloch states. Our calculations include the Berry connection term in the k-derivative…
Extrinsic Orbital Hall Effect and Orbital Relaxation in Mesoscopic Devices
Anderson L. R. Barbosa, Hyun-Woo Lee, Tatiana G. Rappoport
Despite recent advances in orbitronics, the influence of disorder on the orbital Hall effect and orbital relaxation mechanisms remains poorly understood. In this work, we numerical…
Symmetry Analysis of the Non-Hermitian Electro-Optic Effect in Crystals
Sylvain Lannebère, Tatiana G. Rappoport, Tiago A. Morgado +2
Here, we investigate how crystal symmetry tailors the non-Hermitian electro-optic effect arising from the Berry curvature dipole. Specifically, we demonstrate the critical influenc…
Orbitronics in Two-dimensional Materials
Tarik P. Cysne, Luis M. Canonico, Marcio Costa +2
Orbitronics explores the control and manipulation of electronic orbital angular momentum in solid-state systems, opening new pathways for information processing and storage. One si…
Extrinsic Orbital Hall Effect: Orbital Skew Scattering and Crossover Between Diffusive and Intrinsic Orbital Transport
Alessandro Veneri, Tatiana G. Rappoport, Aires Ferreira
Despite the recent success of identifying experimental signatures of the orbital Hall effect (OHE), the research on the microscopic mechanisms behind this unique phenomenon is stil…
Transport of orbital currents in systems with strong intervalley coupling: the case of Kekulé distorted graphene
Tarik P. Cysne, R. B. Muniz, Tatiana G. Rappoport
We show that orbital currents can describe the transport of orbital magnetic moments of Bloch states in models where the formalism based on valley current is not applicable. As a c…
Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
Tarik P. Cysne, W. J. M. Kort-Kamp, Tatiana G. Rappoport
We study the orbital Hall effect (OHE) in the AC regime using bilayer graphene (BLG) as a prototypical material platform. While the unbiased BLG has gapless electronic spectra, app…
Orbital Hall effect and topology on a two-dimensional triangular lattice: from bulk to edge
Anderson L. R. Barbosa, Luis M. Canonico, Jose H. García +1
We investigate a generalized multi-orbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials, and particularly relevant f…
Ultrathin films of black phosphorus as suitable platforms for unambiguous observation of the orbital Hall effect
Tarik P. Cysne, Marcio Costa, Marco Buongiorno Nardelli +2
Phosphorene, a monolayer of black phosphorus, is a two-dimensional material that lacks a multivalley structure in the Brillouin zone and has negligible spin-orbit coupling. This ma…
Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
Tarik P. Cysne, Filipe S. M. Guimarães, Luis M. Canonico +3
The orbital magnetoelectric effect (OME) generically refers to the appearance of an orbital magnetization induced by an applied electric field. Here, we show that nanoribbons of tr…
Generation and control of non-local chiral currents in graphene superlattices by orbital Hall effect
Juan Salvador-Sánchez, Luis M. Canonico, Ana Pérez-Rodríguez +15
Graphene-based superlattices offer a new materials playground to exploit and control a higher number of electronic degrees of freedom, such as charge, spin, or valley for disruptiv…
Engineering transistor-like optical gain in two-dimensional materials with Berry curvature dipoles
Tatiana G. Rappoport, Tiago A. Morgado, Sylvain Lannebère +1
Semiconductor transistors are essential elements of electronic circuits as they enable, for example, the isolation or amplification of voltage signals. While conventional transisto…
Connecting Higher-Order Topology with the Orbital Hall Effect in Monolayers of Transition Metal Dichalcogenides
Marcio Costa, Bruno Focassio, Tarik P. Cysne +5
Monolayers of transition metal dichalcogenides (TMDs) in the 2H structural phase have been recently classified as higher-order topological insulators (HOTI), protected by rot…
Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach
Tarik P. Cysne, Sayantika Bhowal, Giovanni Vignale +1
Using an effective Dirac model, we study the orbital Hall effect (OHE) in bilayers of transition metal dichalcogenides with 2H stacking (2H-TMD). We use first-order perturbation th…
Topological Graphene plasmons in a plasmonic realization of the Su-Schrieffer-Heeger Model
Tatiana G. Rappoport, Yuliy V. Bludov, Frank H. L. Koppens +1
Graphene hybrids, made of thin insulators, graphene, and metals can support propagating acoustic plasmons (AGPs). The metal screening modifies the dispersion relation of usual grap…
Orbital magnetoelectric effect in zigzag nanoribbons of p-band systems
Tarik P. Cysne, Filipe S. M. Guimarães, Luis M. Canonico +2
Profiles of the spin and orbital angular momentum accumulations induced by a longitudinally applied electric field are explored in nanoribbons of -band systems with a honeycomb…
Disentangling orbital and valley Hall effects in bilayers of transition metal dichalcogenides
Tarik P. Cysne, Marcio Costa, Luis M. Canonico +3
It has been recently shown that monolayers of transition metal dichalcogenides (TMDs) in the 2H structural phase exhibit relatively large orbital Hall conductivity plateaus within…
Topological Photonic Tamm-States and the Su-Schrieffer-Heeger Model
J. C. G. Henriques, T. G. Rappoport, Y. V. Bludov +2
In this paper we study the formation of topological Tamm states at the interface between a semi-infinite one-dimensional photonic-crystal and a metal. We show that when the system…
Orbital Hall Insulating Phase in Transition Metal Dichalcogenide Monolayers
Luis M. Canonico, Tarik P. Cysne, Alejandro Molina-Sanchez +2
We show that H-phase transition metal dichalcogenides (TMDs) monolayers such as MoS and WSe, are orbital Hall insulators. They present very large orbital Hall conductivity…
KITE: high-performance accurate modelling of electronic structure and response functions of large molecules, disordered crystals and heterostructures
Simão M. João, Miša Anđelković, Lucian Covaci +3
We present KITE, a general purpose open-source tight-binding software for accurate real-space simulations of electronic structure and quantum transport properties of large-scale mo…
Two-dimensional orbital Hall insulators
Luis M. Canonico, Tarik P. Cysne, Tatiana G. Rappoport +1
The orbital-Hall effect (OHE), similarly to the spin-Hall effect (SHE), refers to the creation of a transverse flow of orbital angular momentum that is induced by a longitudinally…