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SUMMARY:Unconventional superconductivity and unconventional magnetism
DTSTART:20260414T203000Z
DTEND:20260414T213000Z
DTSTAMP:20260425T074400Z
UID:indico-event-283@eventreg.ads.ttu.edu
DESCRIPTION:Speakers: Alex Eaton (University of Cambridge)\n\nElectronic p
 hases of matter\, such as magnetism and superconductivity\, are defined an
 d distinguished by their order parameters that quantify the spontaneous sy
 mmetry breaking underlying each phase. The simplest cases are the uniform 
 magnetization of ferromagnets and isotropic gap function of conventional s
 uperconductors. Unconventional superconductors often have a nodal gap func
 tion\, where the gap changes sign at nodes on the Fermi surface. This conc
 ept of unconventional or nodal order parameter symmetry has recently been 
 extended to numerous magnetic systems\, including altermagnets\, in which 
 up- and down-spin species are non-degenerate around the Fermi surface. Thi
 s talk will introduce these concepts\, and give an overview of our recent 
 work on the putatively p-wave superconductor UTe2. I will also explain why
  quantum oscillations are an ideal diagnostic tool for identifying new alt
 ermagnets\, and introduce our recent quantum oscillation experiments that 
 empirically confirmed g-wave altermagnetism in CrSb [arXiv:2601.14526]. We
  believe this study constitutes the first time a sign-changing order param
 eter has been conclusively determined - mapped in 3D by a bulk-sensitive t
 hermodynamic probe - in any materials class: magnetic\, superconducting\, 
 or otherwise.\n\nhttps://eventreg.ads.ttu.edu/event/283/
LOCATION:Zoom
URL:https://eventreg.ads.ttu.edu/event/283/
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