Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Carrillo-Bastos R"'
The study of waveguide propagating modes is essential for achieving directional electronic transport in two-dimensional materials. Simultaneously, exploring potential gaps in these systems is crucial for developing devices akin to those employed in c
Externí odkaz:
http://arxiv.org/abs/2306.17299
Publikováno v:
Phys. Rev. B 108, L161401 (2023)
Deviation from perfect conical dispersion in Dirac materials, such as the presence of mass or tilting, enhances control and directionality of electronic transport. To identify these signatures, we analyze the thermal derivative spectra of optical ref
Externí odkaz:
http://arxiv.org/abs/2306.03383
Graphene nanoribbons (GNRs) are natural waveguides for electrons in graphene. Nevertheless, unlike micron-sized samples, conductance is nearly suppressed in these narrow graphene stripes, mainly due to scattering with edge disorder generated during s
Externí odkaz:
http://arxiv.org/abs/2207.13875
Publikováno v:
Phys. Rev. B 105, L201408, Published 31 May 2022
We explore topological transitions in the type of propagation of surface electromagnetic modes in massive anisotropic tilted Dirac systems. The presence of tilting and mass gives rise to an indirect band gap that strongly modifies the joint density o
Externí odkaz:
http://arxiv.org/abs/2201.12690
Publikováno v:
Phys. Rev. B 103, 165415 (2021)
We explore the effect of valley-contrasting gaps in the optical response of two-dimensional anisotropic tilted Dirac systems. We study the spectrum of intraband and interband transitions through the joint density of states (JDOS), the optical conduct
Externí odkaz:
http://arxiv.org/abs/2012.14508
Autor:
Mojarro, M. A., Ibarra-Sierra, V. G., Sandoval-Santana, J. C., Carrillo-Bastos, R., Naumis, Gerardo G.
Publikováno v:
Phys. Rev. B 102, 165301 (2020)
Electromagnetic dressing by a high-frequency field drastically modifies the electronic transport properties on Dirac systems. Here its effects on the energy spectrum of graphene with two possible phases of Kekul\'e distortion (namely, Kek-Y and Kek-O
Externí odkaz:
http://arxiv.org/abs/2007.15239
Autor:
Mojarro, M. A., Ibarra-Sierra, V. G., Sandoval-Santana, J. C., Carrillo-Bastos, R., Naumis, Gerardo G.
Publikováno v:
Phys. Rev. B 101, 165305 (2020)
In a system with a Dirac-like linear dispersion there are always states that fulfill the resonance condition for electromagnetic radiation of arbitrary frequency $\Omega$. When a flat band is present two kinds of resonant transitions are found. Consi
Externí odkaz:
http://arxiv.org/abs/2001.11661
Publikováno v:
Phys. Rev. B 94, 125422 (2016)
Deformations in graphene systems are central elements in the novel field of {\it straintronics}. Various strain geometries have been proposed to produce specific properties but their experimental realization has been limited. Because strained folds c
Externí odkaz:
http://arxiv.org/abs/1604.00732
Publikováno v:
J. Phys.: Condens. Matter 27 175301 (2015)
We study transport properties of hexagonal zigzag graphene quantum rings connected to semi-infinite nanoribbons. Open two-fold symmetric structures support localized states that can be traced back to those existing in the isolated six-fold symmetric
Externí odkaz:
http://arxiv.org/abs/1409.2583
Publikováno v:
(2014) Phys. Rev. B. 90(4): 041411
The coupling of geometrical and electronic properties is a promising venue to engineer conduction properties in graphene. Confinement added to strain allows for interplay of different transport mechanisms with potential device applications. To invest
Externí odkaz:
http://arxiv.org/abs/1405.1962