49 citations · 230 across the 21 of their papers we have counts for
22 papers
Antiresonances of Wannier-Stark ladders in Su-Schrieffer-Heeger lattices
Yonatan Betancur-Ocampo, Guillermo Monsivais
We demonstrate that Wannier-Stark ladders (WSLs) in one-dimensional Su-Schrieffer-Heeger (SSH) chains manifest as antiresonance signatures in the electron transmission. We study th…
Anomalous Klein tunnelling with magnetic barriers in strained graphene
Edgardo Marin-Colli, Tonatiuh Gómez-Ramírez, O-Excell Gutierrez +3
We study electron transport in a strained graphene sheet subjected to a sequence of electrostatic and magnetic barriers. Employing a modified and improved transfer-matrix frame…
Dual energy-differentiated topological transition in artificial red phosphorus chains
Vít Jakubský, B. Manjarrez-Montañez, Rafael A. Méndez-Sánchez +1
We investigate the spectral and transport properties of an atomic chain of red phosphorus. We reveal the separation of flat-band states from the rest of the system and calculate it…
Electronic transport and anti-super-Klein tunneling in few-layer black phosphorous
Jorge Alfonso Lizarraga-Brito, Armando Arciniega-Gutiérrez, Yonatan Betancur-Ocampo +1
The electronic transport in few-layer black phosphorus (FLBP) nanoribbons is studied theoretically. The system is modeled on the basis of band-structures, which have been measured…
Band Structure Engineering of Coupled-Resonator Phononic Polyacetylene and Polyaminoborane
B. Manjarrez-Montañez, R. A. Méndez-Sánchez, Y. Betancur-Ocampo +1
A methodology for constructing a quasi-one-dimensional coupled-resonator phononic metamaterial is presented. This is achieved through the design of artificial phononic analogs of t…
Kekulé distortions in graphene on cadmium sulfide
Yonatan Betancur-Ocampo, Santiago Galván y García, Samuel Tehuacanero Nuñez +3
The deposition of a two-dimensional material on the surface of a three-dimensional crystal can generate superlattices with electronic properties modified through the proximity spin…
Identifying Klein tunneling signatures in bearded SSH lattices from bent flat bands
Yonatan Betancur-Ocampo, Guillermo Monsivais
Su-Schrieffer-Heeger (SSH) lattices have helped to understand key concepts of topological insulators. In this paper, we study the transmission properties of junctions of beard…
Atomically thin current pathways in graphene through Kekulé-O engineering
Santiago Galván y García, Yonatan Betancur-Ocampo, Francisco Sánchez-Ochoa +1
We demonstrate that the current flow in graphene can be guided on atomically thin current pathways by means of the engineering of Kekulé-O distortions. A grain boundary in these di…
Twofold topological phase transitions induced by third-nearest-neighbor interactions in 1D chains
Yonatan Betancur-Ocampo, B. Manjarrez-Montañez, A. M. Martínez-Argüello +1
Strong long-range hoppings up to third nearest neighbors may induce a topological phase transition in one-dimensional chains. Unlike the Su-Schrieffer-Heeger model, this transition…
Extended transfer matrix method for electron transmission in anisotropic 2D materials: Interplay of strain and (a)periodicity of potentials
Erik Díaz-Bautista, Yonatan Betancur-Ocampo, Alfredo Raya
We extend the conventional transfer matrix method to include anisotropic features for electron transmission in two-dimensional materials, such as breaking reflection law in pseudo-…
Generalized Hamiltonian for Kekulé graphene and the emergence of valley-cooperative Klein tunneling
Santiago Galván y García, Thomas Stegmann, Yonatan Betancur-Ocampo
We introduce a generalized Hamiltonian describing not only all topological phases observed experimentally in Kekulé graphene (KekGr) but predicting also new ones. These phases show…
Valley-dependent time evolution of coherent electron states in tilted anisotropic Dirac materials
Yonatan Betancur-Ocampo, Erik Díaz-Bautista, Thomas Stegmann
The effect of the Dirac cone tilt of anisotropic two-dimensional materials on the time evolution of coherent electron states in the presence of electric and magnetic fields is stud…
Steering the current flow in twisted bilayer graphene
Jesús Arturo Sánchez-Sánchez, Montserrat Navarro-Espino, Yonatan Betancur-Ocampo +2
A nanoelectronic device made of twisted bilayer graphene (TBLG) is proposed to steer the direction of the current flow. The ballistic electron current, injected at one edge of the…
Anomalous Floquet tunneling in uniaxially strained graphene
Yonatan Betancur-Ocampo, Parisa Majari, Diego Espitia +2
The interplay of strain engineering and photon-assisted tunneling of electrons in graphene is considered for giving rise to atypical transport phenomena. The combination of uniaxia…
Gradient-index electron optics in graphene pn junctions
Emmanuel Paredes-Rocha, Yonatan Betancur-Ocampo, Nikodem Szpak +1
We investigate the electron transport in smooth graphene pn junctions, generated by gradually varying electrostatic potentials. The numerically calculated coherent current flow pat…
Phosphorene pnp junctions as perfect electron waveguides
Yonatan Betancur-Ocampo, Emmanuel Paredes-Rocha, Thomas Stegmann
The current flow in phosphorene pnp junctions is studied. At the interfaces of the junction, omni-directional total reflection takes place, named anti-super-Klein tunneling, as thi…
Phase-space representation of Landau and electron coherent states for uniaxially strained graphene
Erik Díaz-Bautista, Yonatan Betancur-Ocampo
Recent experimental advances in the reconstruction of the Wigner function (WF) for electronic systems have led us to consider the possibility of employing this theoretical tool in…
Electron optics in phosphorene pn junctions: Negative reflection and anti super-Klein tunneling
Yonatan Betancur-Ocampo, François Leyvraz, Thomas Stegmann
Ballistic electrons in phosphorene junctions show optical-like phenomena. Phosphorene is modeled by a tight-binding Hamiltonian that describes its electronic structure at low…
Perfect transmission of 3D massive Kane fermions in HgCdTe Veselago lenses
Y Betancur-Ocampo, V Gupta
The transmission properties of three-dimensional (3D) massive Kane fermions in HgCdTe (MCT) heterojunctions have been studied using the simplified Kane-Melé model. Based on our the…
Partial positive refraction in asymmetric Veselago lenses of uniaxially strained graphene
Y. Betancur-Ocampo
Asymmetric Veselago lenses (AVLs) can be created from ballistic - and -- homojunctions of uniaxially strained graphene. This atypical converging electron flow emerge…
Controlling electron flow in anisotropic Dirac materials heterojunctions: a super-diverging lens
Y. Betancur-Ocampo
Ballistic heterojunctions of Dirac materials offer the opportunity of exploring optics-like phenomena in electronic systems. In this paper, a new perfect lens through special posit…
Landau Levels in Uniaxially Strained Graphene: A Geometrical Approach
Y. Betancur-Ocampo, M. E. Cifuentes-Quintal, G. Cordourier-Maruri +1
The effect of strain on the Landau levels (LLs) spectra in graphene is studied, using an effective Dirac-like Hamiltonian which includes the distortion in the Dirac cones, anisotro…