Spin-Peierls phases in pyrochlore antiferromagnets
نویسندگان
چکیده
منابع مشابه
Spin-Peierls and spin-Hquid phases of Kagomb quantum antiferromagnets
The ground state of the spin-i nearest-neighbor Heisenberg quantum antiferromagnet on the KagomC lattice probably lacks &in order; therefore, conventional spin-wave analysis breaks down. To ascertain the ground state, we instead use a systematic l/n expansion with .SU(n) fermions. Two distinct states occur in the large-n limit, depending on the size of the biquadratic interaction z When ?=O, th...
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The microscopic description of spin-Peierls substances is discussed. Particular attention is paid to the ordered (dimerised and incommensurably modulated) phases. Important points are the adiabatic and the antiadiabatic approach, generic soliton forms, elastic and magnetic interchain couplings. The wealth and the accuracy of experimental information collected for the first inorganic spin-Peierl...
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The discovery of the first inorganic spin-Peierls substance CuGeO3 by Hase et al. [1] renewed the interest in the phases of spin-Peierls substances (for reviews, see [2]). The constituting element of these substances are quasi one-dimensional spin chains coupled to the lattice degrees of freedom. The incommensurably modulated (I) phase is particularly interesting since this phase is the most co...
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I consider the class of “depleted pyrochlore” lattices of corner-sharing triangles, made by removing spins from a pyrochlore lattice such that every tetrahedron loses exactly one. Previously known examples are the “hyperkagome” and “kagome staircase”. I give criteria in terms of loops for whether a given depleted lattice can order analogous to the kagome “ √ 3× √ 3” state, and also show how the...
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We discuss the quantum paramagnetic phases of Heisenberg antiferromagnets on the 1/5-depleted square lattice found in CaV4O9. The possible phases of the quantum dimer model on this lattice are obtained by a mapping to a quantum-mechanical height model. In addition to the “decoupled” phases found earlier, we find a possible intermediate spin-Peierls phase with spontaneously-broken lattice symmet...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2002
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.66.064403