The planar pyrochlore: a Valence Bond Crystal

• Main Authors: Fouet, J. -B, Mambrini, M, Sindzingre, P, Lhuillier, C
• Format: Journal Article
• Language: English
• Published: 03.08.2001
• Subjects: Physics - Strongly Correlated Electrons

Exact diagonalizations of the spin-1/2 Heisenberg model on the checkerboard lattice have been performed for sizes up to N=36 in the full Hilbert space and N=40 in the restricted subspace of first neighbor dimers. This antiferromagnet does not break SU(2) symmetry and displays long range order in 4-s...