Quantum renormalization of high-energy excitations in the 2D Heisenberg model
Open Access
- 7 June 2000
- journal article
- letter
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 12 (25), L405-L408
- https://doi.org/10.1088/0953-8984/12/25/104
Abstract
We find using Monte Carlo simulations of the spin-1/2 2D square lattice nearest neighbour quantum Heisenberg antiferromagnet that the high-energy peak locations at (π, 0) and (π/2, π/2) differ by about 6%, (π/2, π/2) being the highest. This is a deviation from linear spin wave theory which predicts equal magnon energies at these points.Keywords
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