81 citations · 81 across the 2 of their papers we have counts for
3 papers · 1 filter
Some formal results for the valence bond basis
K. S. D. Beach, A. W. Sandvik
In a system with an even number of SU(2) spins, there is an overcomplete set of states--consisting of all possible pairings of the spins into valence bonds--that spans the S=0 Hilb…
Site dilution of quantum spins in the honeycomb lattice
Eduardo V. Castro, N. M. R. Peres, K. S. D. Beach +1
We discuss the effect of site dilution on both the magnetization and the density of states of quantum spins in the honeycomb lattice, described by the antiferromagnetic Heisenberg…
Field-induced Antiferromagnetism and the Kondo Insulator-to-Metal Transition
K. S. D. Beach, Patrick A. Lee, P. Monthoux
The Kondo lattice model, augmented by a Zeeman term, serves as a useful model of a Kondo insulator in an applied magnetic field. A variational mean field analysis of this system on…