Electronic and magnetic spectra in the t-J model on the honeycomb lattice
Seminars
Theory of Condensed Matter – Seminar “Statistical Mechanics”
Date and Time: Tuesday, 26 June 2018, at 4:00 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «Electronic and magnetic spectra in the t-J model on the honeycomb lattice»
Speaker: N.M. Plakida (BLTP JINR)
Abstract:
A spin-rotation-invariant Green-function theory for the antiferromagnetic t-J Heisenberg model on the two-dimensional honeycomb lattice is formulated. Employing a generalized mean-field approximation for arbitrary temperatures and hole dopings, the electronic and spin-excitation spectra and thermodynamic quantities (two-spin correlation functions, staggered magnetization, magnitic susceptibility, correlation length) are calculated by solving a coupled system of self-consistency equations for the correlation functions.