2 papers
cond-mat.stat-mech2001
Exact bounds on the critical frustration in the Shastry-Sutherland Model
Ute Löw, Erwin Müller-Hartmann
We discuss the phase diagram of the Shastry-Sutherland model for arbitrary spin S and derive rigorous lower and upper bounds on the phase boundaries of the dimer phase by using var…
cond-mat1999
Thermodynamical Properties of a Spin 1/2 Heisenberg Chain Coupled to Phonons
Rainer W. Kühne, Ute Löw
We performed a finite-temperature quantum Monte Carlo simulation of the one-dimensional spin-1/2 Heisenberg model with nearest-neighbor interaction coupled to Einstein phonons. Our…