Berlin 2018 – scientific programme

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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: Talk

Friday, March 16, 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.