Quantum renormalization of high energy excitations in the 2D Heisenberg antiferromagnet

Details Quantum renormalization of high energy excitations in the 2D Heisenberg antiferromagnet Quantum renormalization of high energy excitations in the 2D Heisenberg antiferromagnet

2000-03-21

arxiv.org/abs/cond-mat/0003350v2

J. Phys.: Condens. Matter 12 (2000) L405-408

Physics

Condensed Matter

Strongly Correlated Electrons

Final version, Latex using iopart & epsfig

Scientific paper

10.1088/0953-8984/12/25/104

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.

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