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VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:LASSP Special Seminar- Veronika Sunko
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20261017T183852Z
UID:tag:localist.com\,2008:EventInstance_47694745842421
DTSTART:20241018T183000Z
DTEND:20241018T193000Z
DESCRIPTION:A Multimodal Approach to Uncovering Magnetic Symmetries: The Ca
 se of Euln2As2\n\n \n\nUnderstanding and manipulating emergent phases\, wh
 ich are themes at the forefront of modern quantum materials research\, rel
 y upon correctly identifying underlying symmetried. This general principle
  has been particularly prominent in materials with coupled electronic and 
 magnetic degrees of freedom\, in which symmetries can cause drastic change
 s to electronic states\, including protecting exotic topological phases. E
 uln2As2 is a prominent example of the latter: it has been identified as a 
 prime candidate to host the elusive axion state [1\,2]. However\, despite 
 intense experimental efforts\, no direct evidence for topology in Euln2As2
  is available\, motivating a reexamination of standard assumptions.\n\nI w
 ill show how combining scattering data with bespoke spatially-resolved sym
 metry-sensitive optical experiements and a group theory analysis led us to
  uniquely identify the two magnetic phases in Euln2As2 [3]. While our data
  contradic previous proposals for magnetic structures\, we demonstrate tha
 t all experimental results on Euln2As2 can be reconciled into a unique pic
 ture. In addition to revealing the causes and consequences of exotic magne
 tism in Euln2As2\, I will highlight the importance of combining the inform
 ation obtained through complementary experimental probes\, with special em
 phasis on probes of time-reversal symmetry breaking. I will argue that suc
 h a multimodal approach is an invaluable asset in the quest for determinin
 g symmetries of complex ordered phases in a braod class of materials. \n\n
  \n\nReferences: \n\n[1] Xu Y.\, “Higher-Order Topology of the Axion Ins
 ulator EuIn2As2\,” Phys. Rev. Lett.\, 122 256402 (2019)\n[2] Riberolles 
 S. X. M. et al.: “Magnetic crystalline-symmetry-protected axion electrod
 ynamics and fieldtunable\nunpinned Dirac cones in EuIn2As2\,” Nat Commun
 \, 12 999 (2021)\n[3] Donoway E\, (…)\, Sunko V.: “Symmetry-breaking p
 athway towards the unpinned broken helix” Phys.\nRev. X 2024\, 14 (3)\, 
 031013.\n\n \n\nBio: \n\nVeronika Sunko is a postdoc at UC Berkeley. She g
 ot her master degree from University of Zagreb in Croatia\, and did her Ph
 D in collaboration between the University of St Andrews and the Max Planck
  Institute for Chemical Physics of Solids in Dresden. For her thesis work 
 she studied the electronic properties of delafossite oxides using angle re
 solved photoemission and uncovered new electronic features in this class o
 f materials. She won several prizes for her thesis work\, including the Sp
 ringer Thesis prize and the  Richard L. Greene Dissertation Award. During 
 her postdoctoral work as a Miller Fellow she has been exploring new method
 s to probe symmetries of quantum materials using light\, and utilizing the
 m to reveal magnetic phases in several Eu-based compounds. In September 20
 25 she will start a new group at the Institute of Science and Technology A
 ustria (ISTA)\, which will combine complementary experimental probes of sy
 mmetry to uncover new states in quantum materials.
GEO:42.449761;-76.4812
LOCATION:Clark 700
SUMMARY:LASSP Special Seminar- Veronika Sunko
URL;VALUE=URI:https://events.cornell.edu/event/lassp-special-seminar-a-mulm
 odal-approach-to-uncovering-magnec-symmetries-the-case-of-euin2as2
CATEGORIES:Seminar
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