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TZID:Europe/Vienna
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DTSTART:20170326T030000
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DTSTART:20161030T020000
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BEGIN:VEVENT
DTSTAMP:20260428T111142Z
UID:58762a1552159340663935@ist.ac.at
DTSTART:20170307T094500
DTEND:20170307T104500
DESCRIPTION:Speaker: Zhanybek Alpichshev\nAbstract: What happens to electro
 ns when both the spin orbit coupling and inter-particle Coulomb repulsion 
 are very strong? While SOC alone can change the topology of the single par
 ticle insulating state\, even short range on-site repulsion by itself can 
 give rise to a Mott insulator - one of the most mysterious and thought pro
 voking phases in solid state physics. In this seminar I will talk about th
 e behaviour of quasiparticles in a frustrated Mott insulator in the presen
 ce of strong spin-orbit coupling. Using ultrafast optical spectroscopy to 
 study Na2IrO3 we found that the low energy properties of non-equilibrium c
 harged quasiparticles are almost entirely determined by their interaction 
 with the magnetic background. We observe that the behaviour of photo-doped
  electrons and holes is drastically different in the magnetically ordered 
 and disordered phases. While in the ordered phase the spin correlations ju
 st renormalize the effective mass of the quasiparticles\, in the latter th
 ey give rise to an effective attraction between charged excitations which 
 grows with distance causing them to become trapped within a bound state in
  a far going analogy with quark confinement inside hadrons.
LOCATION:Seminar room Big Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:pdelreal@ist.ac.at
SUMMARY:Zhanybek Alpichshev: Non-equilibrium dynamics of a frustrated Mott 
 insulator
URL:https://talks-calendar.ista.ac.at/events/297
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