Zobrazeno 1 - 10
of 1 897
pro vyhledávání: '"Brey, L."'
Publikováno v:
Carbon 168, 1-11 (2020)
We investigate the production of spin-polarized currents in corrugated graphene nanoribbons. Such corrugations are modeled as multiple regions with Rashba spin-orbit interactions, where concave and convex curvatures are treated as Rashba regions with
Externí odkaz:
http://arxiv.org/abs/1908.07629
Autor:
Valencia, S., Calderón, M. J., López-Mir, L., Kostantinovic, Z., Schierle, E., Weschke, E., Brey, L., Martínez, B., Balcells, Ll.
Publikováno v:
Phys. Rev. B 98, 115142 (2018)
Spin-orbit coupling in magnetic systems lacking inversion symmetry can give rise to non trivial spin textures. Magnetic thin films and heterostructures are potential candidates for the formation of skyrmions and other non-collinear spin configuration
Externí odkaz:
http://arxiv.org/abs/1808.09990
Publikováno v:
Phys. Rev. B 99, 045427 (2019)
Spin interactions of magnetic impurities mediated by conduction electrons is one of the most interesting and potentially useful routes to ferromagnetism in condensed matter. In recent years such systems have received renewed attention due to the adve
Externí odkaz:
http://arxiv.org/abs/1808.05957
Publikováno v:
ACS Photonics 4, 2978-2988 (2017)
We demonstrate via three examples that topological insulators (TI) offer a new platform for plasmonics. First, we show that the collective excitations of a thin slab of a TI display spin-charge separation. This gives rise to purely charge-like optica
Externí odkaz:
http://arxiv.org/abs/1706.09403
Publikováno v:
Phys. Rev. B 96, 201111 (2017)
We study topological crystalline insulators doped with magnetic impurities, in which ferromagnetism at the surface lowers the electronic energy by spontaneous breaking of a crystalline symmetry. The number of energetically equivalent ground states is
Externí odkaz:
http://arxiv.org/abs/1705.06414
Publikováno v:
In Carbon 30 October 2020 168:1-11
Publikováno v:
J. Phys. Chem. C, 2015, 119, 10076
We study the transport properties of a twisted bilayer graphene flake contacted by two monolayer nanoribbons which act as leads. We analyze the conductance in terms of the spectra of the bilayer nanoribbon and the monolayer contacts. The low-energy t
Externí odkaz:
http://arxiv.org/abs/1407.6594
Autor:
Brey, L., Fertig, H. A.
Publikováno v:
Physical Review B 89, 085305 (2014)
We develop a simple model of surface states for topological insulators, developing matching relations for states on surfaces of different orientations. The model allows one to write simple Dirac Hamiltonians for each surface, and to determine how per
Externí odkaz:
http://arxiv.org/abs/1312.5593
Publikováno v:
Phys. Rev. B 88, 205427 (2013)
We discuss plasmonic excitations in a thin slab of a topological insulators. In the limit of no hybridization of the surface states and same electronic density of the two layers, the electrostatic coupling between the top and bottom layers leads to o
Externí odkaz:
http://arxiv.org/abs/1308.5904
Publikováno v:
Phys.Rev.B 87, 125414, (2013)
We study the electronic properties of a twisted trilayer graphene, where two of the layers have Bernal stacking and the third one has a relative rotation with respect to the AB-stacked layers. Near the Dirac point, the AB-twisted trilayer graphene sp
Externí odkaz:
http://arxiv.org/abs/1301.3052