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Pressure-induced valence crossover in superconducting CeCu2Si2.
The weak electron transfer and the continuous valence change under pressure suggests a crossover regime with the hypothetical valence line terminating at a critical end point T(cr) close to zero. Expand
Magnetic excitations in the ferromagnetic superconductor UGe2.
We report that the uniform magnetization is not conserved in the magnetic excitation spectrum of UGe2. The measured spectrum is therefore different from that in d-electron ferromagnetic metals in aExpand
Understanding the complex phase diagram of uranium: the role of electron-phonon coupling.
An experimental determination of the dispersion of the soft phonon mode along in uranium as a function of pressure is reported, which allows a full understanding of the complex phase diagram of uranium and the interplay between the charge-density wave and superconductivity. Expand
Field Reentrance of the Hidden Order State of URu2Si2 under Pressure
Combination of neutron scattering and thermal expansion measurements under pressure shows that the so-called hidden order phase of URu 2 Si 2 reenters in magnetic field when antiferromagnetism (AF)Expand
Direct observation of quadrupolar excitons in the heavy-fermion superconductor PrOs4Sb12.
The narrowing of the linewidths of the excitations below thesuperconducting transition temperature indicates the close connection between the superconductivity and the excitons. Expand
Signature of hidden order in heavy fermion superconductor URu 2 Si 2 : Resonance at the wave vector Q 0 = ( 1,0,0 )
Simultaneous neutron scattering and thermal expansion measurements on the heavy-fermion superconductor ${\text{URu}}_{2}{\text{Si}}_{2}$ under hydrostatic pressure of 0.67 GPa have been performed inExpand
Precise Study of the Resonance at Q0 = (1, 0, 0) in URu2Si2
New inelastic neutron scattering experiments have been performed on URu 2 Si 2 with special focus on the response at Q 0 =(1,0,0), which is a clear signature of the hidden order (HO) phase of theExpand
High magnetic field study of CePd2Si2
The de Haas–van Alphen (dHvA) effect in the heavy fermion system CePd2Si2 was studied by magnetic torque measurements in magnetic fields up to 28 T at low temperature. A clear magnetic torque anomalyExpand
Field re-entrant hidden-order phase under pressure in URu2Si2.
The temperature dependence of the upper critical field H(c2) for [Formula: see text] and [100] determined by the AC specific heat measurements, corresponding to the bulk superconductivity in a high quality single crystal. Expand