Quantum Phase Transitions in Coupled Dimer Compounds

Details Quantum Phase Transitions in Coupled Dimer Compounds Quantum Phase Transitions in Coupled Dimer Compounds

2004-11-24

arxiv.org/abs/cond-mat/0411599v3

Phys. Rev. B 72, 024440 (2005).

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 9 eps-figures

Scientific paper

10.1103/PhysRevB.72.024440

We study the critical properties in cubic systems of antiferromagnetically coupled spin dimers near magnetic-field induced quantum phase transitions. The quantum critical points in the zero-temperature phase diagrams are determined from quantum Monte Carlo simulations. Furthermore, scaling properties of the uniform magnetization and the staggered transverse magnetization across the quantum phase transition in magnetic fields are calculated. The critical exponents are derived from Ginzburg-Landau theory. We find excellent agreement between the quantum Monte Carlo simulations and the analytical results.

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