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11 papers · 2 filters
Exotic Superconducting Phase in CeCu2Si2 Close to Antiferromagnetism : A Cu-NQR Study under Hydrostatic Pressure
Y. Kawasaki, K. Ishida, T. Mito +5
We report Cu nuclear-quadrupole-resonance results under pressure on a homogeneous CeCu2Si2 (Tc = 0.65 K) that revealed critical magnetic fluctuations at the border to an antiferrom…
Coexistence of Superconductivity and Antiferromagnetism in Heavy-Fermion Superconductor CeCu_{2}(Si_{1-x}Ge_{x})_{2} Probed by Cu-NQR --A Test Case for the SO(5) Theory--
Y. Kitaoka, K. Ishida, Y. Kawasaki +3
We report on the basis of Cu-NQR measurements that superconductivity (SC) and antiferromagnetism (AF) coexist on a microscopic level in CeCu_{2}(Si_{1-x}Ge_{x})_{2}, once a tiny am…
Superconductivity on the threshold of magnetism in CePd2Si2 and CeIn3
F. M. Grosche, I. R. Walker, S. R. Julian +4
The magnetic ordering temperature of some rare earth based heavy fermion compounds is strongly pressure-dependent and can be completely suppressed at a critical pressure, p, ma…
Ab initio calculation of resonant X-ray scattering in Manganites
Patrizia Benedetti, Jeroen van den Brink, Eva Pavarini +2
We study the origin of the resonant x-ray signal in manganites and generalize the resonant cross-section to the band structure framework. With {\it ab initio} LSDA and LSDA+U calcu…
Structure determination, valence, and superexchange in the dimerized low temperature phase of alpha'-NaV2O5
A. Bernert, T. Chatterji, P. Thalmeier +1
We report results of a new analysis for the low-temperature structure of alpha'-NaV2O5 from synchrotron x-ray diffraction experiments. We confirm the existence of two inequivalent…
Theory of spin wave excitations of metallic A-type antiferromagnetic manganites
G. Jackeli, N. B. Perkins, N. M. Plakida
The spin dynamic of the metallic A-type antiferromagnetic manganites is studied. An effective nearest-neighbour Heisenberg spin wave dispersion is derived from the double exchange…