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S. Ostanin

As seen in: Physical Review B
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Articles by S. Ostanin

Emerging Two-Dimensional Conductivity at the Interface between Mott and Band Insulators

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By S. Ostanin, D. Maryenko, P. Buczek, I. Mertig
| Physical Review B
Intriguingly, conducting perovskite interfaces between ordinary band insulators are widely explored, whereas similar interfaces with Mott insulators are still not quite understood. Here, we address the (001), (110), and (111) interfaces between the LaTiO3 Mott, and large band gap KTaO3 insulators. Based on first-principles calculations, we reveal a mechanism of interfacial conductivity, which is distinct from a formerly studied one applicable to interfaces between polar wideband insulators.
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Externally controlled and switchable two-dimensional electron gas at the Rashba interface between ferroelectrics and heavy $d$ metals

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By Martin Luther Halle-Wittenberg, T. Aull, I. V. Maznichenko, S. Ostanin
| Physical Review B
Abstract Strong spin-orbit coupling in noncentrosymmetric materials and interfaces results in remarkable physical phenomena, such as nontrivial spin textures, which may exhibit Rashba, Dresselhaus, and other intricated configurations. This provides a promising basis for nonvolatile spintronic devices and further implications. Here, we simulate from first principles a two-dimensional electron gas in ultrathin platinum and palladium layers grown on ferroelectric PbTiO3(001).
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