Speaker
Mr
Simon Gerber
(Laboratory for Neutron Scattering, Paul Scherrer Institut)
Description
The interplay of spin and charge fluctuations can lead to quantum phases with exceptional electronic properties. A case in point is magnetically-driven superconductivity, where magnetic correlations fundamentally affect the underlying symmetry and generate new physical properties. The superconducting wave-function in most known magnetic superconductors does not break translational symmetry. However, it has been predicted that modulated triplet p-wave superconductivity occurs in singlet d-wave superconductors with spin-density wave (SDW) order.
Here we report evidence for the presence of a spatially inhomogeneous p-wave Cooper pair-density wave (PDW) in CeCoIn5. We show that the SDW domains can be switched completely by a tiny change of the magnetic field direction, which is naturally explained by the presence of triplet superconductivity. Further, the Q-phase phase emerges in a common magneto-superconducting quantum critical point. The Q-phase of CeCoIn5 thus represents a generic example where spatially modulated superconductivity is associated with SDW order.
Primary author
Mr
Simon Gerber
(Laboratory for Neutron Scattering, Paul Scherrer Institut)
Co-authors
Prof.
Andrea Bianchi
(Université de Montréal)
Dr
Christof Niedermayer
(Paul Scherrer Institut)
Dr
Eric Bauer
(Los Alamos National Laboratory)
Dr
Eric Ressouche
(CEA Grenoble)
Dr
Joe Thompson
(Los Alamos National Laboratory)
Dr
Jorge Gavilano
(Paul Scherrer Institut)
Dr
Marek Bartkowiak
(Paul Scherrer Institut)
Dr
Michel Kenzelmann
(Paul Scherrer Institut)
Ms
Nikola Egetenmeyer
(Paul Scherrer Institut)
Dr
Roman Movshovich
(Los Alamos National Laboratory)
