Magnetic fluctuations close to an antiferromagnetic quantum critical point in heavy fermion alloys

POSTER

Abstract

Neutron scattering spectra of the heavy fermion compounds Ce(Cu,Au)$_6$ and CeNi$_2$Ge$_2$ will be compared to characterize the magnetic correlations and dynamics close to an antiferromagnetic quantum critical point. While the magnetic response in Ce(Cu,Au)$_6$ reveals quantum critical fluctuations which can be consistently described in a simple although unconventional picture, the scenario in CeNi$_2$Ge$_2$ is more complex, both defying the ``ideal'' conventional scenario expected for a three dimensional antiferromagnetic quantum critical point. (Work in collaboration with G. Aeppli, D.F. McMorrow, N. Christensen, M. Adams, O. Tegus, J. Mydosh, Y. Qiu.)

Authors

  • Almut Schroeder

  • Vishal Pandya

    Plasma Dynamics Corp., Department of Chemistry, University of Calabria, P. Bucci-15c, 87036 Rende (CS), ITALY, Air Force Institute of Technology, Gothenburg University, Sweden, Denison University, Department of Physics, University of Notre Dame, Department of Physics, John Carroll University, Department of Chemistry, The University of Akron, Department of Phyiscs, The University of Akron, Faculty of Chemical Technology, University of Pardubice, Czech Republic, Johns Hopkins University, Baltimore MD, Kent State University, Kent OH, University of Iowa, Physics Dept., Cleveland State University, Ohio State University, Rochester Institute of Technology, The Ohio State University, University of Akron, NASA Glenn Research Center, National Center For Space Exploration Research, Penn State College of Medicine, Department of Physics, Kent State University

  • Vishal Pandya

    Plasma Dynamics Corp., Department of Chemistry, University of Calabria, P. Bucci-15c, 87036 Rende (CS), ITALY, Air Force Institute of Technology, Gothenburg University, Sweden, Denison University, Department of Physics, University of Notre Dame, Department of Physics, John Carroll University, Department of Chemistry, The University of Akron, Department of Phyiscs, The University of Akron, Faculty of Chemical Technology, University of Pardubice, Czech Republic, Johns Hopkins University, Baltimore MD, Kent State University, Kent OH, University of Iowa, Physics Dept., Cleveland State University, Ohio State University, Rochester Institute of Technology, The Ohio State University, University of Akron, NASA Glenn Research Center, National Center For Space Exploration Research, Penn State College of Medicine, Department of Physics, Kent State University