Hole-magnon and hole-spinon interactions in frustrated antiferromagnets

HAMAD, I. J.; A. MEZIO; L.O. MANUEL; A. E. TRUMPER

Río de Janeiro

Workshop; The 4th I2CAM/FAPERJ Summer School New Phenomena in Quantum Matter; 2010

I2CAM

We study the dynamics of a single hole in a frustrated antiferromagnet, byconsidering the Interaction between the hole and magnons and spinons. Forthis we use the t-J model with frustrated interactions, representing thespin operators with Schwinger bosons. We treat the magnetic Hamiltonian in amean field approximation, and calculate the dynamical structure factorS(q,w). We compute the hole self energy by means of the self consistent Bornapproximation (SCBA), and evaluate its spectral function, analyzing the holedynamics in different magnetic phases and how it is affected by the couplingwith magnons and the spinon continuum.