Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Yonatan Betancur-Ocampo"'
We introduce a generalized Hamiltonian describing not only all topological phases observed experimentally in Kekul\'e graphene (KekGr) but predicting also new ones. These phases show features like a quadratic band crossing point, valley splitting, or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c2405c5c43b33c974fbaca109156f8e
http://arxiv.org/abs/2111.06001
http://arxiv.org/abs/2111.06001
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 studied. We propose a canonical transformation that maps the anisotropic D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab3c4ff223a338f3f93912e21d832e2f
http://arxiv.org/abs/2107.04160
http://arxiv.org/abs/2107.04160
Publikováno v:
Physical Review B. 103
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 uniaxial strain and a time-periodic potential barrier helps to control the pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12212e0dd57763021a5bc43d5a3a7bdd
https://doi.org/10.1103/physrevb.103.155433
https://doi.org/10.1103/physrevb.103.155433
Autor:
Jesús Arturo Sánchez-Sánchez, Montserrat Navarro-Espino, Yonatan Betancur-Ocampo, José Eduardo Barrios-Vargas, Thomas Stegmann
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 bottom layer, can be guided predominantly to one of the lateral edges
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea3b6503e9e51a9f84c81a5eaf82002b
We investigate the electron transport in smooth graphene pn junctions, generated by gradually varying electrostatic potentials. The numerically calculated coherent current flow patterns can be understood largely in terms of semi-classical trajectorie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58cb7a783d0f280e7fdd45523760c689
http://arxiv.org/abs/2009.05535
http://arxiv.org/abs/2009.05535
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 this effect is not due to an energetically forbidden region but due to ps
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dad79539c7f51c49f2500036a094587d
http://arxiv.org/abs/2006.12441
http://arxiv.org/abs/2006.12441
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 the analysis of electron dynamics of uniaxially strained graphene. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::331c33ec665043ed94377a839d9e8777
http://arxiv.org/abs/1910.09696
http://arxiv.org/abs/1910.09696
Ballistic electrons in phosphorene $pn$ junctions show optical-like phenomena. Phosphorene is modeled by a tight-binding Hamiltonian that describes its electronic structure at low energies, where the electrons behave in the zigzag direction as massiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::174e86b480da0414451027fe159d9251
http://arxiv.org/abs/1906.08250
http://arxiv.org/abs/1906.08250
Autor:
Yonatan Betancur-Ocampo
Publikováno v:
Physical Review B. 98
Asymmetric Veselago lenses (AVLs) can be created from ballistic $p$-$n$ and $n$-$p$-$n$ homojunctions of uniaxially strained graphene. This atypical converging electron flow emerges by applying uniaxial tension out of the device's symmetry axes. A pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b39fbcd1de5a9c96a9ee73b910e4dcc
https://doi.org/10.1103/physrevb.98.205421
https://doi.org/10.1103/physrevb.98.205421
Publikováno v:
Annals of Physics. 359:243-251
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, anisotropy and spatial-dependence of the Fermi velocity induced by the lattice
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f091fab535a33f0157f2179544a9d01
https://doi.org/10.1016/j.aop.2015.04.026
https://doi.org/10.1016/j.aop.2015.04.026