24 citations · 65 across the 8 of their papers we have counts for
8 papers
Magneto-elastic Effects in
U. Löw, S. Zherlitsyn, K. Araki +5
We report new results for the elastic constants studied in Faraday and Cotton-Mouton geometry in TbGaO (TGG), a frustrated magnetic substance with strong spin-phonon…
Neel order in the two-dimensional S=1/2 Heisenberg Model
Ute Löw
The existence of Neel order in the S=1/2 Heisenberg model on the square lattice at T=0 is shown using inequalities set up by Kennedy, Lieb and Shastry in combination with high prec…
Ground state properties of two spin models with exactly known ground states on the square lattice
A. Sindermann, U. Löw, J. Zittartz
We introduce a new two-dimensional model with diagonal four spin exchange and an exactly knownground-state. Using variational ansaetze and exact diagonalisation we calculate upper…
Structural and magnetic instabilities of layered magnetic systems
Carsten Aits, Ute Löw, Andreas Klümper +1
We present a study of the magnetic order and the structural stability of two-dimensional quantum spin systems in the presence of spin-lattice coupling. For a square lattice it is s…
Thermodynamic properties of the two-dimensional S=1/2 Heisenberg antiferromagnet coupled to bond phonons
Carsten H. Aits, Ute Löw
By applying a quantum Monte Carlo procedure based on the loop algorithm we investigate thermodynamic properties of the two-dimensional antiferromagnetic S=1/2 Heisenberg model coup…
Spin-Phonon Chains with Bond Coupling
Carsten Raas, Ute Löw, Götz S. Uhrig +1
We investigate the antiadiabatic limit of an antiferromagnetic S=1/2 Heisenberg chain coupled to Einstein phonons via a bond coupling. The flow equation method is used to decouple…