IFIR 05409
INSTITUTO DE FISICA DE ROSARIO
Unidad Ejecutora - UE
artículos
Título:
The Lagrangian formalism for the t-J model applied to weakly doped antiferromagnets.
Autor/es:
O. S. ZANDRON
Revista:
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Editorial:
World Scientific
Referencias:
Lugar: Londres; Año: 2009
ISSN:
0217-9792
Resumen:
From our Lagrangian formalism for the t-J model previously developed, renormalized magnetic properties in weakly doped antiferromagnets are evaluated. The renormalization effects essentialy appear due to the interaction of particle-hole with the spin wave. For small concentration of holes the self-energies can be computed. Taking an approximate form for the particle spectral function the cuasiparticle peak and the incoherent continuum region are analyzed in order to evaluate the softening and the damping in the spin excitations of antiferromagnets weakly doped. The results can be confronted with previous one obtained by means of the Hamiltonian t-J model in the slave-fermion Schwinger boson representation.
