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DTSTART:20200329T030000
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DTSTART:20191027T020000
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DTSTAMP:20260403T220437Z
UID:5c5c38a48b83e791462546@ist.ac.at
DTSTART:20200204T110000
DTEND:20200204T120000
DESCRIPTION:Speaker: Ekaterina Paerschke\nhosted by Mikhail Lemeshko\nAbstr
 act: Iridates are an exciting family of Mott insulators due to the competi
 tion of different equally strong fundamental interactions observed in them
 : electron-electron correlations\, spin-orbit coupling (SOC)\, and spin-la
 ttice coupling. Moreover\, exploring the physics of the iridates is expect
 ed to shed light onto high-temperature superconductivity\, as quasi-two-di
 mensional square lattice iridium oxides such as Sr2IrO4 have strong struct
 ural and electronic similarities to the famous superconducting 3d family o
 f copper oxides. However\, surprisingly no superconductivity has been repo
 rted in iridates so far. After introducing this interesting family of stro
 ngly correlated materials in some detail\, I will present our recent theor
 etical advances in understanding charge and magnetic excitations\, as reve
 aled by Photoemission Spectroscopy (ARPES) and Resonant Inelastic X-ray sc
 attering (RIXS). In 2018\, it was discovered that in iridates\, SOC mediat
 es unusual almost rigid locking of the magnetic momenta to the lattice thr
 ough the orbital momenta. Therefore\, tuning the local crystal environment
  emerges as a new route to control structural and physical properties. I w
 ill discuss how magnetic and electronic degrees of freedom can be manipula
 ted by applying external pressure and strain\, as discovered recently usin
 g RIXS and two-magnon Raman scattering\, and how do we understand it from 
 the theoretical perspective.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:slandaue@ist.ac.at
SUMMARY:Ekaterina Paerschke: Competing electron-electron correlations\, spi
 n-orbit coupling\, and spin-lattice coupling in iridates: how to use them 
 to tune magnetic interactions and charge gap
URL:https://talks-calendar.ista.ac.at/events/2410
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