%0 Journal Article
%A Gaul, C.
%A Domínguez-Adame Acosta, Francisco
%A Sols Lucía, Fernando
%A Zapata, I.
%T Feshbach-type resonances for two-particle scattering in graphene
%D 2014
%@ 0163-1829
%U https://hdl.handle.net/20.500.14352/33623
%X Two-particle scattering in graphene is a multichannel problem, where the energies of the identical or opposite-helicity channels lie in disjoint energy segments. Due to the absence of Galilean invariance, these segments depend on the total momentum Q. The dispersion relations for the two opposite-helicity scattering channels are analogous to those of two one-dimensional tight-binding lattices with opposite dispersion relations, which are known to easily bind states at their edges. When an s-wave separable interaction potential is assumed, those bound states reveal themselves as three Feshbach resonances in the identical-helicity channel. In the limit Q -> 0, one of the resonances survives and the opposite-helicity scattering amplitudes vanish.
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