INVESTIGADORES
TRUMPER Adolfo Emilio
congresos y reuniones científicas
Título:
Quasiparticle excitations in a frustrated antiferromagnet
Autor/es:
ADOLFO EMILIO TRUMPER; GAZZA, CJ; MANUEL, LO
Lugar:
Buenos Aires
Reunión:
Workshop; At the frontier of the condensed matter II; 2004
Institución organizadora:
Centro Atomico Constituyentes (CNEA)
Resumen:
We have computed the quasiparticle wave function correspondingto a hole injected in a triangularantiferromagnet. We have taken into accountmulti-magnon contributions within the self consistent Born approximation.We have found qualitative differences, under sign reversal ofthe integral transfer t, regarding the multi-magnoncomponents and the own existence ofthe quasiparticle excitations. Such differences are due to thesubtle interplay between magnon-assisted and free hoppingmechanisms. We conclude that the conventional quasiparticlepicture can be broken by geometrical frustration without invokingspin liquid phases.
