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:
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.
Laboratories:




 Record created 2007-01-24, last modified 2018-03-17


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