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TT: Fachverband Tiefe Temperaturen
TT 56: Poster Session: Low-Dimensional Systems
TT 56.14: Poster
Wednesday, March 22, 2017, 15:00–19:00, P2-OG4
Probing the dimensionality-driven metal-insulator transition in spin-orbit coupled SrIrO3 thin films — •Philipp Schütz1, Lenart Dudy1, Judith Gabel1, Martin Stübinger1, Marius-Adrian Husanu2, Vladimir Strocov2, Michael Sing1, and Ralph Claessen1 — 1Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Germany — 2Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland
Although typically viewed to be disparate properties, the large spin-orbit-coupling (SOC) and relatively weak electronic correlations are roughly of the same order of magnitude in iridate compounds. The prototypical Ruddlesden-Popper iridates Srn+1IrnO3n+1 have attracted special attention since they exhibit a SOC-induced Mott transition dependent on the value of n. Whereas the quasi-two-dimensional compound Sr2IrO4 (n=1) shows a Mott-like insulating state, its three-dimensional analogue SrIrO3 (n=∞) is a correlated metal in proximity to a metal-insulator-transition. As an alternative to single crystal growth of Ruddlesden-Popper-iridates with different n, we investigate the effect of dimensionality through synthesis of atomically thin SrIrO3 films by pulsed laser deposition, which analogously exhibit a metal-insulator-transition as function of thickness. We present a systematic investigation of the k-resolved electronic structure near the metal-insulator-transition by means of synchrotron-based soft x-ray angular-resolved photoemission spectroscopy (SX-ARPES), which sheds light on the intricate interplay between spin-orbit coupling, electronic correlations and dimensionality.