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oai:docta.ucm.es:20.500.14352/336232024-09-04T18:00:01Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Gaul, Christopher author Domínguez-Adame Acosta, Francisco author Sols Lucía, Fernando author Zapata, I. author 2014-01-21 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. 0163-1829 10.1103/PhysRevB.89.045420 https://hdl.handle.net/20.500.14352/33623 http://dx.doi.org/10.1103/PhysRevB.89.045420 http://journals.aps.org Feshbach-type resonances for two-particle scattering in graphene