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Quantum disorder in the two-dimensional pyrochlore Heisenberg antiferromagnet

Abstract:

We present the results of an exact diagonalization study of the spin-1/2 Heisenberg antiferromagnet on a two-dimensional version of the pyrochlore lattice, also known as the square lattice with crossings or the checkerboard lattice. Examining the low energy spectra for systems of up to 24 spins, we find that all clusters studied have non-degenerate ground states with total spin zero, and big energy gaps to states with higher total spin. We also find a large number of non-magnetic excitations ...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.64.094412

Authors


Palmer, SE More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Journal:
Phys. Rev. B
Volume:
64
Issue:
9
Pages:
94412
Publication date:
2001-09-01
DOI:
EISSN:
1095-3795
ISSN:
1098-0121
URN:
uuid:b860ccf3-a9ef-4c8c-888c-bed3da5388a6
Source identifiers:
612
Local pid:
pubs:612
Keywords:

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