Zobrazeno 1 - 10
of 537
pro vyhledávání: '"Peres, N. M. R."'
Biased bilayer graphene (BBG) is an important system for studies of excitonic effects in graphene--based systems, with its easily tunable bandgap. This bandgap is governed by an external gate voltage, allowing one to tune the optical response of the
Externí odkaz:
http://arxiv.org/abs/2405.04894
In this paper we study the topology of the bands of a plasmonic crystal composed of graphene and of a metallic grating. Firstly, we derive a Kronig-Penney type of equation for the plasmonic bands as function of the Bloch wavevector and discuss the pr
Externí odkaz:
http://arxiv.org/abs/2404.19576
Publikováno v:
Journal of the Optical Society of America B 41, 626 (2024)
In this paper a thorough theoretical study of a new class of collective excitations, dubbed hyperbolic surface phonon plasmon polaritons, is performed. This new type of light-matter excitations are shown to have unique properties that allows to explo
Externí odkaz:
http://arxiv.org/abs/2403.00722
Publikováno v:
Phys. Rev. B 109, 195427, Published 21 May 2024
In this paper we discussed the topological transition between trivial and nontrivial phases of a quasi-periodic (Aubry-Andr\'e like) mechanical Su-Schrieffer-Heeger (SSH) model. We find that there exists a nontrivial boundary separating the two topol
Externí odkaz:
http://arxiv.org/abs/2402.05651
Using the tight-binding model, we report a gap opening in the energy spectrum of the twisted bilayer graphene under the application of pressure, that can be further amplified by the presence of a perpendicular bias voltage. The valley edges are locat
Externí odkaz:
http://arxiv.org/abs/2310.09645
Autor:
Antão, T. V. C., Peres, N. M. R.
Publikováno v:
Phys. Rev. B 107, 235410 (2023)
We argue that strain engineering is a powerful tool which may facilitate the experimental realization and control of topological phases in laser-driven 2D ferromagnetic systems. To this extent, we show that by applying a circularly polarized laser fi
Externí odkaz:
http://arxiv.org/abs/2303.03305
Publikováno v:
Nano Lett. 2023 23 (10) 4510
Magnons and plasmons are two very different types of collective modes, acting on the spin and charge degrees of freedom, respectively. At first sight, the formation of hybrid plasmon-magnon polaritons in heterostructures of plasmonic and magnetic sys
Externí odkaz:
http://arxiv.org/abs/2211.08949
Publikováno v:
J. Phys.: Condens. Matter 35 035302 (2023)
With the ever-growing interest in quantum computing, understanding the behaviour of excitons in monolayer quantum dots has become a topic of great relevance. In this paper, we consider a Wannier exciton confined in a triangular quantum dot of hexagon
Externí odkaz:
http://arxiv.org/abs/2209.03331
Publikováno v:
Appl. Sci. 2022, 12(15), 7872
Scattering of excitons by free carriers is a phenomena which is especially important when considering moderately to heavily doped semiconductors in low temperature experiments, where the interaction of excitons with acoustic and optical phonons is re
Externí odkaz:
http://arxiv.org/abs/2207.08787
We consider a perfectly conducting infinite cylinder with radius $R$, and investigate the Casimir-Polder (CP) and van der Waals (vdW) interactions with a neutral polarizable particle constrained to move in a plane distant $x_0>R$ from the axis of the
Externí odkaz:
http://arxiv.org/abs/2207.01671