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DTSTAMP:20260424T143155Z
UID:653fc098d0e67084970295@ist.ac.at
DTSTART:20231113T150000
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DESCRIPTION:Speaker: Philip Moll\nhosted by Kimberly Modic\nAbstract: Mater
 ials that can host different states of electronic order form a recurring t
 heme in physics and materials science\, and they are of particular interes
 t if they are coupled strongly. A famous example are ferroelectrics\, in w
 hich electric polarization and magnetism not only coexist but are strongly
  linked. This both unveils a rich physics of correlated states\, and also 
 opens unexpected application avenues as the coupling promises to manipulat
 e one state by a stimulus that primarily acts on another  say switching ma
 gnetism using electric fields.Recently\, materials based on the structural
  motif of the Kagome web have attracted significant attention for their te
 ndency to host such strongly coupled phases. In particular\, the centro-sy
 mmetric layered Kagome metal (K\,Cs)V3Sb5 have entered the focus of experi
 mental and theoretical research. They host a charge-density-wave type tran
 sition at elevated temperatures ~100K\, followed by a superconducting tran
 sition at 3K (exact values depend on composition). Yet there is another ty
 pe of electronic order which thus far eludes exact microscopic identificat
 ion. A series of experimental probes detects the onset of anomalous behavi
 or around T~30-40K\, including thermal Hall\, mSR\, NMR\, magnetic torque\
 , Kerr rotation. The anomalous low-temperature state carries the character
 istics of a chiral\, nematic and time-reversal-symmetry breaking fluid (al
 l of which are under most active debate currently).Yet what crystallizes o
 ut of the current state of experimental data is a highly entangled system 
 which is extraordinarily responsive to external perturbations. This materi
 als main strength is equally its weakness\, the unusual degree of coupling
  between states can hinder its systematic investigation. However\, it is a
 lready clear that it provides a platform to explore strongly coupled corre
 lated phases\, and as a result it displays a thus-far unknown electromagne
 tic response\, a diode in which the forward direction can be switched by t
 he application of a magnetic field. I will review the current state of the
  field\, and discuss ongoing projects in my department.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:dboukalo@ist.ac.at
SUMMARY:Philip Moll: Correlated Order at the Tipping Point  in the Kagome M
 etal CsV3Sb5 P.J.W. Moll
URL:https://talks-calendar.ista.ac.at/events/4574
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