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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 30: SrTiO3: A Versatile Material from Bulk Quantum Paraelectric to 2D Superconductor III (joint session TT/KFM/MA/O)
KFM 30.8: Talk
Friday, March 22, 2024, 11:30–11:45, H 0104
All-electrical measurement of the spin-charge conversion effect in nanodevices based on SrTiO3 two-dimensional electron gases — •Fernando Gallego1, Felix Trier1,2, Srijani Mallik1, Julien Brehin1, Sara Varotto1, Luis Moreno1, Tanay Gosavy3, Chia-Ching Lin3, Jean-René Coudevylle4, Lucía Iglesias1, Fèlix Casanova5,6, Ian Young3, Laurent Vila7, Jean-Philippe Attané7, and Manuel Bibes1 — 1Unité Mixte de Phys, CNRS-Thales, Univ. Paris-Saclay, 91767 Palaiseau, France. — 2Dept of Energy Conservation and Storage, Univ. of Denmark, 2800 Kgs. Lyngby, Denmark. — 3Comp. Res. Intel Corp., Hillsb., OR 97124, USA. — 4Centre de Nanosciences et de Nanotech., CNRS, Université Paris-Sud, Université Paris-Saclay, France. — 5CIC nanoGUNE BRTA, 20018 Donostia, Spain. — 6IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain. — 7Univ. Grenoble Alpes, CNRS, CEA, SPINTEC, Grenoble, France.
We report all-electrical spin-injection and spin-charge conversion experiments in nanoscale devices harnessing the inverse Edelstein effect of SrTiO3 2DEGs. We have designed, patterned and fabricated nanodevices in which a spin current injected from a cobalt layer into a LaAlO3/SrTiO3 2DEG is converted into a charge current. We optimized the spin-charge conversion signal by back-gating. We further disentangled the inverse Edelstein contribution from spurious effects. The combination of non-volatility and high energy efficiency of these devices could potentially lead to new technology paradigms for beyond-CMOS computing architectures.
Keywords: 2DEG; Complex Oxides; MESO; SrTiO3