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URL:https://murmitoyen.com/events/vanille/udem/detail/419042
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Switching of magnetic domains reveals spatially inhomogeneous super
 conductivity – Michel Kenzelmann\, PSI\, Switzerland
DESCRIPTION:Michel Kenzelmann\, Head of the Laboratory for Developments a
 nd Methods (LDM)\, Paul Scherrer Institut (PSI)\, 5232 Villigen PSI\, Suis
 seThe interplay of magnetic and charge fluctuations can lead to quantum ph
 ases with exceptional electronic properties. A case in point is magnetical
 ly-driven superconductivity [1\,2]\, where magnetic correlations fundament
 ally affect the underlying symmetry and generate new physical properties. 
 The superconducting wavefunction in most known magnetic superconductors do
 es not break translational symmetry. However\, it has been predicted that 
 modulated triplet p-wave superconductivity occurs in singlet d-wave superc
 onductors with spin-density-wave (SDW) order [3\,4] . Here we report evide
 nce for the presence of a spatially inhomogeneous p-wave Cooper pair-densi
 ty wave in CeCoIn5. We show that the SDW domains can be switched completel
 y by a tiny change of the magnetic field direction\, which is naturally ex
 plained by the presence of triplet superconductivity. Further\, the Q-phas
 e emerges in a common magneto-superconducting quantum critical point. The 
 Q-phase of CeCoIn5 thus represents an example where spatially modulated su
 perconductivity is associated with SDW order.Mathur\, N. D. et al.\, Natur
 e\, 394\, 39–43 (1998).Monthoux\, P.\, Pines\, D. & Lonzarich G. G.\, Na
 ture\, 450\, 1177–1183 (2007).Aperis\, A.\, Varelogiannis\, G. & Littlew
 ood\, P. B.\, Phys. Rev. Lett.\, 104\, 216403 (2010).Agterberg\, D. F.\, S
 igrist\, M. & Tsunetsugu\, H. O\, Phys. Rev. Lett. 102\, 207004 (2009). S
 ite web du groupe du  Dr. KenzelmannCette conférence est présentée par
  le RQMP Versant Nord du Département de physique de l'Université de Mon
 tréal et le Département de génie physique de Polytechnique Montréal.
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