Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Costa, D. R."'
Autor:
Bandeira, N. S., Chaves, Andrey, de Castro, L. V., Filho, R. N. Costa, Mirzakhani, M., Peeters, F. M., da Costa, D. R.
We present a systematic study of the energy levels of twisted bilayer graphene (tBLG) quantum dots (QD) and rings (QR) under an external perpendicular magnetic field. The confinement structures are modeled by a circular dot-like- and ring-like-shaped
Externí odkaz:
http://arxiv.org/abs/2410.12014
Autor:
Uchôa, E. S., Lima, W. P., Sena, S. H. R., Chaves, A. J. C., Pereira Jr., J. M., da Costa, D. R.
We investigate the electronic properties of nanoribbons made out of monolayer Lieb, transition, and kagome lattices using the tight-binding model with a generic Hamiltonian. It allows us to map the evolutionary stages of the interconvertibility proce
Externí odkaz:
http://arxiv.org/abs/2408.15764
Magnetized ferromagnetic disks or wires support strong inhomogeneous fields in their borders. Such magnetic fields create an effective potential, due to Zeeman and diamagnetic contributions, that can localize charge carriers. For the case of two-dime
Externí odkaz:
http://arxiv.org/abs/2403.04404
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
In this work, we investigate the dynamics of the wave packet traveling through a porous semiconductor channel, with the defects being simulated by a disordered scattering region produced by obstruction potentials. The theoretical framework is based o
Externí odkaz:
http://arxiv.org/abs/2306.06507
Using a tight-binding model along with the mean-field Hubbard method, we investigate the effect of twisting angle on the magnetic properties of twisted bilayer graphene (tBLG) quantum dots (QDs) with triangular shape and zigzag edges. We consider suc
Externí odkaz:
http://arxiv.org/abs/2304.06228
Publikováno v:
Phys. Rev. B 107, 165427 (2023)
In this work, we develop the basic formalism to study trions in semiconductor layered materials using the Faddeev equations in momentum space for three different particles lying in two dimensions. We solve the trion Faddeev coupled integral equations
Externí odkaz:
http://arxiv.org/abs/2212.09600
Publikováno v:
Phys. Lett. B. (2021), 136773
We study the three-boson bound-state mass and wave functions for ground and excited states within the three-body relativistic framework with Kamada and Gl\"ocke boosted potentials in the limit of a zero-range interaction. We adopt a nonrelativistic s
Externí odkaz:
http://arxiv.org/abs/2111.02015
Publikováno v:
Phys. Rev. Lett. 127, 106801 (2021)
The moir\'e pattern observed in stacked non-commensurate crystal lattices, such as hetero-bilayers of transition metal dichalcogenides, produces a periodic modulation of their bandgap. Excitons subjected to this potential landscape exhibit a band str
Externí odkaz:
http://arxiv.org/abs/2107.00102
Using the continuum model, we investigate the electronic properties of two types of bilayer graphene (BLG) quantum ring (QR) geometries: (i) an isolated BLG QR and (ii) a monolayer graphene (MLG) with a QR put on top of an infinite graphene sheet (hy
Externí odkaz:
http://arxiv.org/abs/2106.00947