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

Syljuasen, O. F.; Ronnow, H. M.

doi:10.1088/0953-8984/12/25/104

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

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.

Published in:

Journal of Physics-Condensed Matter, 12, 25, L405-L408

Year:

2000

ISSN:

0953-8984

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.

DOI:

10.1088/0953-8984/12/25/104

Laboratories:

LQM

Record appears in:

Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LQM - Laboratory for Quantum Magnetism
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