37 citations · 78 across the 9 of their papers we have counts for
9 papers
Magnetic phase transitions protected by topological quantum geometry transitions: effects of electron-electron interactions in the Creutz ladder system
Abdiel de Jesús Espinosa-Champo, Gerardo G. Naumis
The interplay between electronic correlations and band topology is a central theme in modern condensed matter physics. In this work, we investigate the effects of on-site Hubbard i…
Hyperbolic Plasmon dispersion and Optical Conductivity of Holey Graphene: signatures of flat-bands
Abdiel de Jesús Espinosa-Champo, Gerardo G. Naumis
Holey graphene (HG) is a novel two-dimensional (2D) material that has attracted considerable attention due to its remarkable electrical, thermal, and mechanical properties. The rec…
When Adiabaticity Is Not Enough to Study Topological Phases in Solid-State Physics: Comparing the Berry and Aharonov-Anandan Phases in 2D Materials
Abdiel de Jesús Espinosa-Champo, Alejandro Kunold, Gerardo G. Naumis
Topological phases emerge as the parameters of a quantum system vary with time. Under the adiabatic approximation, the time dependence can be eliminated, allowing the Berry topolog…
Flat bands without twists: periodic holey graphene
Abdiel de Jesús Espinosa-Champo, Gerardo G. Naumis
\textit{Holey Graphene} (HG) is a widely used graphene material for the synthesis of high-purity and highly crystalline materials. In this work, we explore the electronic propertie…
Curved graphene: a possible answer to the problem of graphene's diverging magnetic susceptibility
Abdiel de Jesús Espinosa-Champo, Gerardo G. Naumis, Pavel Castro-Villarreal
A study of strongly curved graphene magnetization and magnetic susceptibility is carried out. Through a Dirac model complemented with a tight-binding model analysis, we are able to…
Fubini-Study metric and topological properties of flat band electronic states: the case of an atomic chain with orbitals
Abdiel Espinosa-Champo, Gerardo G. Naumis
The topological properties of the flat band states of a one-electron Hamiltonian that describes a chain of atoms with orbitals are explored. This model is mapped onto a Kitae…
Why the first magic-angle is different from others in twisted graphene bilayers: interlayer currents, kinetic and confinement energy and wavefunction localization
Leonardo A. Navarro-Labastida, Abdiel Espinosa-Champo, Enrique Aguilar-Mendez +1
The chiral Hamiltonian for twisted graphene bilayers is analyzed in terms of its squared Hamiltonian which removes the particle-hole symmetry and thus one bipartite lattice, allowi…
Reduction of the Twisted Bilayer Graphene Chiral Hamiltonian into a matrix operator and physical origin of flat-bands at magic angles
Gerardo G. Naumis, Leonardo A. Navarro-Labastida, Enrique Aguilar-Méndez +1
The chiral Hamiltonian for twisted graphene bilayers is written as a matrix operator by a renormalization of the Hamiltonian that takes into account the particle-hole sy…
Multifractal wave functions of charge carriers in graphene with folded deformations, ripples or uniaxial flexural modes: analogies to the quantum Hall effect under random pseudomagnetic fields
Abdiel E. Champo, Gerardo G. Naumis
The electronic behavior in graphene under arbitrary uniaxial deformations, such as foldings or flexural fields is studied by including in the Dirac equation pseudoelectromagnetic f…