5 A ug 2 00 3 Quantum spin liquids : a large - S route .
نویسنده
چکیده
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 valencebond 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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تاریخ انتشار 2003