Stefan Wessel Former Group Member Curent Location: adjunct professor, University of Stuttgart Working on: Quantum Magnetism

Papers Written:

2005:

• Quantum Phase Transitions in Coupled Dimer Compounds
  O. Nohadani, S. Wessel, and S. Haas, Phys. Rev. B 72, 024440 (2005)

• Bose-Glass Phases in Disordered Quantum Magnets
  O. Nohadani, S. Wessel, and S. Haas, Phys. Rev. Lett. 95, 227201 (2005)

• Universal scaling at field-induced magnetic phase transitions
  O. Nohadani, S. Wessel, B. Normand, and S. Haas, Phys. Rev. B 69, 220402 (2004)

• Quantum Antiferromagnetism in Quasicrystals
  S. Wessel, A. Jagannathan, and S. Haas, Phys. Rev. Lett. 90, 177205 (2003)

• Redistribution of spectral weight in Haldane chains doped with spin-1/2 moments
  S. Wessel and S. Haas, Phys. Rev. B 65, 132402 (2002)

• Phase diagram and thermodynamic properties of the square lattice of antiferromagnetic spin-1/2 triangles in La₄Cu₃MoO₁₂
  S. Wessel and S. Haas, Phys. Rev. B 63, 140403 (2001)

• Order by Disorder from Nonmagnetic Impurities in a Two-Dimensional Quantum Spin Liquid
  S. Wessel, B. Normand, M. Sigrist, and S. Haas, Phys. Rev. Lett. 86, 1086-1089 (2001)

• Field-Induced Magnetic Order in Quantum Spin Liquids
  S. Wessel, M. Olshanii, and S. Haas, Phys. Rev. Lett. 87, 206407 (2001)

• Excitation spectra and thermodynamic response of segmented Heisenberg spin chains
  S. Wessel and S. Haas, Phys. Rev. B 61, 15262-15268 (2000)

• Three-dimensional ordering in weakly coupled antiferromagnetic ladders and chains
  S. Wessel and S. Haas, Phys. Rev. B 62, 316-323 (2000)

• Magnetic Field Induced Ordering in Quasi-One-Dimensional Quantum Magnets
  S. Wessel and S. Haas, Eur. Phys. J. B 16, 393 (2000)