Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 106: Complex Oxides: Bulk Properties, Surfaces and Interfaces (joint session TT/MA/KFM)
TT 106.7: Vortrag
Freitag, 16. März 2018, 11:00–11:15, H 0110
Dimensionality-driven metal-insulator transition in spin-oribt coupled SrIrO3 — •Philipp Schütz1, Domenico Di Sante1, Lenart Dudy1, Judith Gabel1, Martin Stübinger1, Martin Kamp1, Yingkai Huang2, Massimo Capone3, Marius-Adrian Husanu4, Vladimir Strocov4, Giorgio Sangiovanni1, Michael Sing1, and Ralph Claessen1 — 1Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Germany — 2Van der Waals - Zeeman Institute, University of Amsterdam, Netherlands — 3CNR-IOM-Democritos National Simulation Center and International School for Advanced Studies (SISSA), Italy — 4Swiss Light Source, Paul Scherrer Institut, Switzerland
Upon reduction of the film thickness we observe a metal-insulator transition in epitaxially stabilized, spin-orbit coupled SrIrO3 ultrathin films. By comparison of the experimental electronic dispersions with density functional theory at various levels of complexity we identify the leading microscopic mechanisms, i.e., a dimensionality-induced re-adjustment of octahedral rotations, magnetism, and electronic correlations. The astonishing resemblance of the band structure in the two-dimensional limit to that of bulk Sr2IrO4 opens new avenues to unconventional superconductivity by "clean" electron doping through electric field gating.