Publications by authors named "O Zheliuk"

Two-dimensional (2D) electron systems are promising for investigating correlated quantum phenomena. In particular, 2D oxides provide a platform that can host various quantum phases such as quantized Hall effect, superconductivity, or magnetism. The realization of such quantum phases in 2D oxides heavily relies on dedicated heterostructure growths.

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Article Synopsis
  • Superconductors can exhibit a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state due to the Zeeman effect from an external magnetic field, which affects Cooper pairings when symmetries like time-reversal are broken.
  • In materials lacking local inversion symmetry, the interplay of the Zeeman effect with spin-orbit coupling (SOC), especially Rashba SOC, allows for the emergence of more accessible Rashba FFLO states across a larger area of the phase diagram.
  • The discovery of an unconventional orbital FFLO state in the multilayer Ising superconductor 2H-NbSe offers a new understanding of finite-momentum superconductivity, featuring a defined phase diagram that identifies multiple
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Graphene moiré superlattice formed by rotating two graphene sheets can host strongly correlated and topological states when flat bands form at so-called magic angles. Here, we report that, for a twisting angle far away from the magic angle, the heterostrain induced during stacking heterostructures can also create flat bands. Combining a direct visualization of strain effect in twisted bilayer graphene moiré superlattices and transport measurements, features of correlated states appear at "non-magic" angles in twisted bilayer graphene under the heterostrain.

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An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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Superconductivity in monolayer transition metal dichalcogenides is characterized by Ising-type pairing induced via a strong Zeeman-type spin-orbit coupling. When two transition metal dichalcogenides layers are coupled, more exotic superconducting phases emerge, which depend on the ratio of Ising-type protection and interlayer coupling strength. Here, we induce superconductivity in suspended MoS bilayers and unveil a coupled superconducting state with strong Ising-type spin-orbit coupling.

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