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Metallic nanograins: spatially nonuniform pairing induced by quantum confinement
M. D. Croitoru, A. A. Shanenko, C. C. Kaun +1
It is well-known that the formation of discrete electron levels strongly influences the pairing in metallic nanograins. Here we focus on another effect of quantum confinement in su…
Vibrational properties of graphene fluoride and graphane
H. Peelaers, A. D. Hernández-Nieves, O. Leenaerts +2
The vibrational properties of graphene fluoride and graphane are studied using ab initio calculations. We find that both sp3 bonded derivatives of graphene have different phonon di…
Electronic and magnetic properties of superlattices of graphene/graphane nanoribbons with different edge hydrogenation
A. D. Hernandez-Nieves, B. Partoens, F. M. Peeters
Zigzag graphene nanoribbons patterned on graphane are studied using spin-polarized ab initio calculations. We found that the electronic and magnetic properties of the graphene/grap…
The ground states of the two-component order parameter superconductor
Mauro M. Doria, Antonio R. de C. Romaguera, F. M. Peeters
We show that in presence of an applied external field the two-component order parameter superconductor falls in two categories of ground states, namely, in the traditional Abrikoso…
Geometry-induced localization of thermal fluctuations in ultrathin superconducting structures
W. V. Pogosov, V. R. Misko, F. M. Peeters
Thermal fluctuations of the order parameter in an ultrathin triangular shaped superconducting structure are studied near , in zero applied field. We find that the order para…
Valley-dependent Brewster angles and Goos-Hanchen effect in strained graphene
Zhenhua Wu, F. Zhai, F. M. Peeters +2
We demonstrate theoretically how local strains in graphene can be tailored to generate a valley polarized current. By suitable engineering of local strain profiles, we find that el…
Proximity induced pseudogap in mesoscopic superconductor/normal-metal bilayers
Guo-Qiao Zha, Lucian Covaci, Shi-Ping Zhou +1
Recent scanning tunneling microscopy measurements of the proximity effect in Au/LaSrCuO and LaSrCuO/LaSrCuO bilayers…
Condensate entanglement and multigap superconductivity in nanoscale superconductors
R. Saniz, B. Partoens, F. M. Peeters
A Green functions approach is used to study superconductivity in nanofilms and nanowires. We show that the superconducting condensate results from the multimodal entanglement, or i…
Two-component mixture of charged particles confined in a channel: melting
W. P. Ferreira, G. A. Farias, F. M. Peeters
The melting of a binary system of charged particles confined in a {\it quasi}-one-dimensional parabolic channel is studied through Monte Carlo simulations. At zero temperature the…
(Giant) Vortex - (anti) vortex interaction in bulk superconductors: The Ginzburg-Landau theory
Andrey Chaves, F. M. Peeters, G. A. Farias +1
The vortex-vortex interaction potential in bulk superconductors is calculated within the Ginzburg-Landau (GL) theory and is obtained from a numerical solution of a set of two coupl…
Landau levels and magnetopolaron effect in dilute GaAs:N
P. M. Krstajić, M. Helm, F. Peeters
The magnetic-field dependence of the energy spectrum of GaAs doped with nitrogen impurities is investigated. Our theoretical model is based on the phenomenological Band Anticrossin…
Extra Dirac points in the energy spectrum for superlattices on single-layer graphene
M. Barbier, P. Vasilopoulos, F. M. Peeters
We investigate the emergence of extra Dirac points in the electronic structure of a periodically spaced barrier system, i.e., a superlattice, on single-layer graphene, using a Dira…