Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-05-17
Phys.Rev.Lett.87:167206,2001
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures, 2 tables
Scientific paper
10.1103/PhysRevLett.87.167206
We investigate the properties of S=1/2 Heisenberg clusters with random frustration using exact diagonalizations. This is a model for a quantum spin glass. We show that the average ground state spin is $S \propto \sqrt{N}$, where N is the number of sites. We also calculate the magnetic susceptibility and the spin stiffness and low-energy excitations, and discuss these in terms of a semiclassical picture.
Oitmaa Jaan
Sushkov Oleg P.
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