Quantum renormalization of high-energy excitations in the 2D Heisenberg model

• Published in: Journal of Physics-Condensed Matter (ISSN: 0953-8984), vol. 12, num. 25, p. L405-L408
• Publication date: 2000

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 (pi, 0) and (pi/2, pi/2) differ by about 6%, (pi/2, pi/2) being the highest This is a deviation from linear spin wave theory which predicts equal magnon energies at these points.

Keywords: SPIN CORRELATIONS ; MONTE-CARLO ; ANTIFERROMAGNET ; TEMPERATURE

Note:

NORDITA, DK-2100 Copenhagen O, Denmark. Riso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, Denmark. Syljuasen, OF, NORDITA, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.

Reference

• LQM-ARTICLE-2000-002
• doi:10.1088/0953-8984/12/25/104

Record created on 2007-01-24, modified on 2017-05-12