Magnetically driven superconductivity in CeCu2Si2

Magnetic excitations as driving force of superconductivity in CeCu2Si2

Coexistence or competition of superconductivity and magnetic order remains an important issue in condensed matter physics. While conventional superconductivity is generally incompatible with magnetism, the magnetic 4f or 5f moments in heavy-fermion superconductors play a crucial role for the appearance of unconventional superconductivity. Similar to the high-temperature cuprate superconductors,...

Superconductivity in magnetically ordered CeTe1.82

M. H. Jung,* A. Alsmadi, H. C. Kim, Yunkyu Bang, K. H. Ahn, K. Umeo, A. H. Lacerda, H. Nakotte, H. C. Ri, and T. Takabatake National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003, USA Material Science Laboratory, Korea Basic Science Institute, Taejeon 305-333, Kor...

Magnetically driven colloidal microstirrer.

Paramagnetic colloidal particles dispersed in water and deposited above magnetic bubble domains of a uniaxial ferrimagnetic garnet film are used as microscopic stirrer when subjected to external rotating magnetic fields. The hydrodynamic flow field above the stirrer is detected by tracking of nonmagnetic microspheres. The vorticity of the flow falls off inversely proportionally to the distance ...

Fully gapped superconductivity with no sign change in the prototypical heavy-fermion CeCu2Si2

In exotic superconductors, including high-Tc copper oxides, the interactions mediating electron Cooper pairing are widely considered to have a magnetic rather than a conventional electron-phonon origin. Interest in this exotic pairing was initiated by the 1979 discovery of heavy-fermion superconductivity in CeCu2Si2, which exhibits strong antiferromagnetic fluctuations. A hallmark of unconventi...

Optically driven superconductivity