Quantum spin liquids: a large-S route

Details Quantum spin liquids: a large-S route Quantum spin liquids: a large-S route

2003-08-05

arxiv.org/abs/cond-mat/0308091v1

J. Phys.: Condens. Matter 16, S709 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Proceedings of Highly Frustrated Magnetism 2003 (Grenoble), 6 LaTeX pages

Scientific paper

10.1088/0953-8984/16/11/019

This paper explores the large-S route to quantum disorder in the Heisenberg antiferromagnet on the pyrochlore lattice and its homologues in lower dimensions. It is shown that zero-point fluctuations of spins shape up a valence-bond solid at low temperatures for one two-dimensional lattice and a liquid with very short-range valence-bond correlations for another. A one-dimensional model demonstrates potential significance of quantum interference effects (as in Haldane's gap): the quantum melting of a valence-bond order yields different valence-bond liquids for integer and half-integer values of S.

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