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DTSTAMP:20260403T220506Z
UID:5c5c38a48b7a8356312119@ist.ac.at
DTSTART:20191105T110000
DTEND:20191105T120000
DESCRIPTION:Speaker: Veronika Sunko\nhosted by Andrew Higginbotham / Zhanyb
 ek Alpichshev\nAbstract: Delafossite oxides are layered compounds\, which 
 can be thought of as natural heterostructures of triangularly coordinated 
 metallic sheets and transition metal oxide blocks. A fascinating range of 
 electronic states can be found both in their bulk and on their surfaces\, 
 including extremely high conductivity (1) in PtCoO2 and PdCoO2\, maximal R
 ashba-like spin-splitting (2) on the transition metal terminated surfaces 
 of PtCoO2\, PdCoO2 and PdRhO2\, Stoner ferromagnetism (3) on the Pd-termin
 ated surface of PdCoO2 and\, perhaps most remarkably\, an intertwined spin
 -charge response due to a Kondo coupling between metallic and Mott insulat
 ing layers (4) in PdCrO2. Our group has investigated these states experime
 ntally with transport measurements and angle resolved photoemission\, and 
 theoretically with first principles calculations and model Hamiltonians\, 
 where applicable. I will show how in a number of cases the simplicity and 
 cleanliness of the materials allows us to pinpoint to the underlying cause
  for the remarkable electronic behaviour\, and in turn to use delafossites
  as model systems to understand complex phenomena.(1) Kushwaha\, P.\, Sunk
 o\, V.\, Moll\, P.J.W.\, Bawden\, L.\, Riley\, J.M.\, Nandi\, N.\, Rosner\
 , H.\, Schmidt\, M.P.\, Arnold\, F.\, Hassinger\, E.\, Kim\, T.K.\, Hoesch
 \, M.\, Mackenzie\, A.P.\, King\, P.D.C.\, 2015\, Science Advances 1\, e15
 00692.(2) Sunko\, V.\, Rosner\, H.\, Kushwaha\, P.\, Khim\, S.\, Mazzola\,
  F.\, Bawden\, L.\, Clark\, O.J.\, Riley\, J.M.\, Kasinathan\, D.\, Haverk
 ort\, M.W.\, Kim\, T.K.\, Hoesch\, M.\, Fujii\, J.\, Vobornik\, I.\, Macke
 nzie\, A.P.\, King\, P.D.C.\, 2017\, Nature 549\, 492(3) Mazzola\, F.\, Su
 nko\, V.\, Khim\, S.\, Rosner\, H.\, Kushwaha\, P.\, Clark\, O.J.\, Bawden
 \, L.\, Markovi?\, I.\, Kim\, T.K.\, Hoesch\, M.\, Mackenzie\, A.P.\, King
 \, P.D.C.\, 2017.\, PNAS 51\, 12956(4) Sunko\, V.\, Mazzola\, F.\, Kitamur
 a\, S.\, Khim\, S.\, Kushwaha\, P.\, Clark\, O. J. \, Watson\, M.\, Markov
 i?\, I.\, Biswas\, D.\,  Pourovskii\, L.\, Kim\, T. K.\, Lee\, T.-L. \, T
 hakur\, P. K.\, Rosner\, H.\, Georges\, A.\, Moessner\, R.\, Oka\, T. \, M
 ackenzie\, A. P.\, and King\, P. D. C.\, 2018\, arXiv:1809.08972\, to be p
 ublished in Science Advances
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Veronika Sunko: Quantum Seminars - Delafossite oxides: natural\, ul
 tra-pure metal-insulator heterostructures
URL:https://talks-calendar.ista.ac.at/events/2151
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