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6 papers · 1 filter
Evolution of Quantum Criticality in CeNi_{9-x}Cu_xGe_4
L. Peyker, C. Gold, E. -W. Scheidt +7
Crystal structure, specific heat, thermal expansion, magnetic susceptibility and electrical resistivity studies of the heavy fermion system CeNi_{9-x}Cu_xGe_4 (0 <= x <= 1) reveal…
Density Matrix Renormalization Group in the Heisenberg Picture
Michael J. Hartmann, Javier Prior, Stephen R. Clark +1
In some cases the state of a quantum system with a large number of subsystems can be approximated efficiently by the density matrix renormalization group, which makes use of redund…
CaCrO3: an anomalous antiferromagnetic metallic oxide
A. C. Komarek, S. V. Streltsov, M. Isobe +13
Combining infrared reflectivity, transport, susceptibility and several diffraction techniques, we find compelling evidence that CaCrO3 is a rare case of a metallic and antiferromag…
Magnetism in Geometrically Frustrated YMnO3 Under Hydrostatic Pressure Studied with Implanted Muons
T. Lancaster, S. J. Blundell, D. Andreica +10
The rare-earth ferroelectromagnet YMnO3 consists of weakly coupled triangular layers of S=2 spins. Below T_N ~ 70 K muon-spin relaxation data show two oscillatory relaxing signals…
Reduction of the ordered magnetic moment in YMnO3 with hydrostatic pressure
M. Janoschek, B. Roessli, L. Keller +3
YMnO3 exhibits a ferroelectric transition at high temperature (~ 900 K) and magnetic ordering at T_N ~ 70 K where the dielectric constant shows an anomaly indicative of the magneto…
Remote-doping scattering and the local field corrections in the 2D electron system in a modulation-doped Si/SiGe quantum well
V. T. Dolgopolov, E. V. Deviatov, A. A. Shashkin +4
The small, about 30% magnetoresistance at the onset of full spin polarization in the 2D electron system in a modulation-doped Si/SiGe quantum well gives evidence that it is the rem…