Luiz H. Santos
YOU?
Author Swipe
View article: CarbOnto: Data Integration Towards Net Zero - Extended Abstract – CTDGSI 2025
CarbOnto: Data Integration Towards Net Zero - Extended Abstract – CTDGSI 2025 Open
This work presents an architecture called CarboFarm, that encompasses an ontology for the syntactic and semantic integration of heterogeneous databases related to the agricultural domain. By utilizing ontology, we contribute to the standar…
View article: Higher-order Van Hove singularities in kagome topological bands
Higher-order Van Hove singularities in kagome topological bands Open
Motivated by the growing interest in band structures featuring higher-order Van Hove singularities (HOVHS), we investigate a spinless fermion kagome system characterized by nearest-neighbor (NN) and next-nearest-neighbor (NNN) hopping ampl…
View article: Fractional Chern Insulators in Twisted Bilayer MoTe$_2$: A Composite Fermion Perspective
Fractional Chern Insulators in Twisted Bilayer MoTe$_2$: A Composite Fermion Perspective Open
The discovery of Fractional Chern Insulators (FCIs) in twisted bilayer MoTe$_2$ has sparked significant interest in fractional topological matter without external magnetic fields. Unlike the flat dispersion of Landau levels, moiré electron…
View article: Entanglement and topology in Su-Schrieffer-Heeger cavity quantum electrodynamics
Entanglement and topology in Su-Schrieffer-Heeger cavity quantum electrodynamics Open
Cavity materials are a frontier to investigate the role of light-matter interactions on the properties of electronic phases of matter. In this work, we raise a fundamental question: can nonlocal interactions mediated by cavity photons dest…
View article: Time-reversal invariant topological moiré flat band: A platform for the fractional quantum spin Hall effect
Time-reversal invariant topological moiré flat band: A platform for the fractional quantum spin Hall effect Open
Motivated by recent observation of the quantum spin Hall effect in monolayer germanene and twisted bilayer transition-metal-dichalcogenides (TMDs), we study the topological phases of moir twisted bilayers with time-reversal symmetry and sp…
View article: Chern Bands with Higher-Order Van Hove Singularities on Topological Moiré Surface States
Chern Bands with Higher-Order Van Hove Singularities on Topological Moiré Surface States Open
In two-dimensional electronic lattices, changes in the topology of the Fermi surface (Lifshitz transitions) lead to Van Hove singularities characterized by a divergence in the electronic density of states. Van Hove singularities can enhanc…
View article: CarbOnto: Data Integration Toward Net Zero
CarbOnto: Data Integration Toward Net Zero Open
Global warming and climate change have been subjects of great interest in recent years. They are understood to be related to greenhouse gas (GHG) emissions. Although agriculture suffers the consequences of these changes, it is one of the t…
View article: Time-Reversal Invariant Topological Moiré Flatband: A Platform for the Fractional Quantum Spin Hall Effect
Time-Reversal Invariant Topological Moiré Flatband: A Platform for the Fractional Quantum Spin Hall Effect Open
Motivated by recent observation of the quantum spin Hall effect in monolayer germanene and twisted bilayer transition-metal-dichalcogenides (TMDs), we study the topological phases of moiré twisted bilayers with time-reversal symmetry and s…
View article: Entanglement and Topology in Su-Schrieffer-Heeger Cavity Quantum Electrodynamics
Entanglement and Topology in Su-Schrieffer-Heeger Cavity Quantum Electrodynamics Open
Cavity materials are a frontier to investigate the role of light-matter interactions on the properties of electronic phases of matter. In this work, we raise a fundamental question: can non-local interactions mediated by cavity photons des…
View article: Triplet pair density wave superconductivity on the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>π</mml:mi></mml:math>-flux square lattice
Triplet pair density wave superconductivity on the -flux square lattice Open
Pair-density waves (PDWs) are superconducting states that spontaneously break translation symmetry in systems with time-reversal symmetry (TRS). Evidence for PDWs has been seen in several recent experiments, as well as in the pseudogap reg…
View article: Emergence of the Chern Supermetal and Pair-Density Wave through Higher-Order Van Hove Singularities in the Haldane-Hubbard Model
Emergence of the Chern Supermetal and Pair-Density Wave through Higher-Order Van Hove Singularities in the Haldane-Hubbard Model Open
While advances in electronic band theory have brought to light new topological systems, understanding the interplay of band topology and electronic interactions remains a frontier question. In this work, we predict new interacting electron…
View article: Quantum Fractality on the Surface of Topological Insulators
Quantum Fractality on the Surface of Topological Insulators Open
Three-dimensional topological insulators support gapless Dirac fermion surface states whose rich topological properties result from the interplay of symmetries and dimensionality. Their topological properties have been extensively studied …
View article: Emergence of Chern Supermetal and Pair-Density Wave through Higher-Order Van Hove Singularities in the Haldane-Hubbard Model
Emergence of Chern Supermetal and Pair-Density Wave through Higher-Order Van Hove Singularities in the Haldane-Hubbard Model Open
While advances in electronic band theory have brought to light new topological systems, understanding the interplay of band topology and electronic interactions remains a frontier question. In this work, we predict new interacting electron…
View article: Triplet Pair-Density Wave Superconductivity on the $π$-flux Square Lattice
Triplet Pair-Density Wave Superconductivity on the $π$-flux Square Lattice Open
Pair-density waves (PDW) are superconducting states that spontaneously break translation symmetry in systems with time-reversal symmetry (TRS). Evidence for PDW has been seen in several recent experiments, as well as in the pseudogap regim…
View article: Unconventional Self-Similar Hofstadter Superconductivity from Repulsive Interactions
Unconventional Self-Similar Hofstadter Superconductivity from Repulsive Interactions Open
Fractal Hofstadter bands have become widely accessible with the advent of moiré superlattices, opening the door to studies of the effect of interactions in these systems. In this work we employ a renormalization group (RG) analysis to demo…
View article: Theory of Hofstadter superconductors
Theory of Hofstadter superconductors Open
We study mean-field states resulting from the pairing of electrons in time-reversal broken fractal Hofstadter bands, which arise in two-dimensional lattices where the unit cell traps magnetic flux $Φ= (p/q)Φ_0$ comparable to the flux quant…
View article: Classification of Topological Phase Transitions and van Hove Singularity Steering Mechanism in Graphene Superlattices
Classification of Topological Phase Transitions and van Hove Singularity Steering Mechanism in Graphene Superlattices Open
We study quantum phase transitions in graphene superlattices in external magnetic fields, where a framework is presented to classify multiflavor Dirac fermion critical points describing hopping-tuned topological phase transitions of intege…
View article: Entanglement entropy of generalized Moore-Read fractional quantum Hall state interfaces
Entanglement entropy of generalized Moore-Read fractional quantum Hall state interfaces Open
Topologically ordered phases of matter can be characterized by the presence of a universal, constant contribution to the entanglement entropy known as the topological entanglement entropy (TEE). The TEE can been calculated for Abelian phas…
View article: Classification of Strongly Disordered Topological Wires Using Machine Learning
Classification of Strongly Disordered Topological Wires Using Machine Learning Open
In this article we apply the random forest machine learning model to classify 1D topological phases when strong disorder is present. We show that using the entanglement spectrum as training features the model gives high classification accu…
View article: Disorder induced power-law gaps in an insulator–metal Mott transition
Disorder induced power-law gaps in an insulator–metal Mott transition Open
Significance Correlated electron systems often show unexpected behavior that defies theoretical explanations. One such mystery is the universal presence of V-shaped gaps with surprisingly linear energy dependence, whose origins are as-yet …
View article: Symmetry-protected topological interfaces and entanglement sequences
Symmetry-protected topological interfaces and entanglement sequences Open
Gapped interfaces (and boundaries) of two-dimensional (2D) Abelian\ntopological phases are shown to support a remarkably rich sequence of 1D\nsymmetry-protected topological (SPT) states. We show that such interfaces can\nprovide a physical…
View article: Chern-Simons composite fermion theory of fractional Chern insulators
Chern-Simons composite fermion theory of fractional Chern insulators Open
We formulate a Chern-Simons composite fermion theory for Fractional Chern Insulators (FCIs), whereby bare fermions are mapped into composite fermions coupled to a lattice Chern-Simons gauge theory. We apply this construction to a Chern ins…
View article: Chern-Simons Composite Fermion Theory of Fractional Chern Insulators
Chern-Simons Composite Fermion Theory of Fractional Chern Insulators Open
We formulate a Chern-Simons composite fermion theory for Fractional Chern Insulators (FCIs), whereby bare fermions are mapped into composite fermions coupled to a lattice Chern-Simons gauge theory. We apply this construction to a Chern ins…
View article: Parafermionic Wires at the Interface of Chiral Topological States
Parafermionic Wires at the Interface of Chiral Topological States Open
We explore a scenario where local interactions form one-dimensional gapped interfaces between a pair of distinct chiral two-dimensional topological states-referred to as phases 1 and 2-such that each gapped region terminates at a domain wa…
View article: Parafermionic wires at the interface of chiral topological states
Parafermionic wires at the interface of chiral topological states Open
We explore a scenario where local interactions form one-dimensional gapped interfaces between a pair of distinct chiral two-dimensional topological states - referred to as phases 1 and 2 - such that each gapped region terminates at a domai…
View article: Instanton effects in lattice models of bosonic symmetry-protected topological states
Instanton effects in lattice models of bosonic symmetry-protected topological states Open
Bosonic symmetry-protected topological (SPT) states are gapped disordered\nphases of matter possessing symmetry-preserving boundary excitations. It has\nbeen proposed that, at long wavelengths, the universal properties of an SPT\nsystem ar…