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Vortex-enhanced Alternating Order Around Impurities in Antiferromagnets by Vaia, Ruggero; Cuccoli, Alessandro is a scholarly article available to read on EtoBox.

What is Vortex-enhanced Alternating Order Around Impurities in Antiferromagnets about?

It has been recently pointed out that the presence of a nonmagnetic impurity in a Heisenberg antiferromagnet generates an alternating order of the surrounding spins which is independent of temperature in a wide range. Quantum Monte Carlo simulations in the two-dimensional $S=1/2$ case confirmed this picture, but showed a counterintuitive enhancement of the alternating order around the Kosterlitz-Thouless transition. We propose here an explanation in terms of the effect of vortex excitations.

Author

Vaia, Ruggero; Cuccoli, Alessandro

Published

2008

Language

EN