Publications

SC-1 etching of Nb and TiN thin films

SC-1 etching of Nb and TiN thin films

Abstract Dry etching techniques, ubiquitous in microelectronics fabrication, often result in challenging levels of undesired collateral plasma-induced damage. In this work, we demonstrate a wet etchin…

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Detection of spin- and valley-polarized states in van der Waals materials via thermoelectric and non-reciprocal transport

Detection of spin- and valley-polarized states in van der Waals materials via thermoelectric and non-reciprocal transport

Abstract We predict thermoelectric and current rectification effects in hybrid junctions formed by Ising superconductors and materials hosting valley-polarized states. Both effects originate from the …

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Giant anomalous Josephson effect as a probe of spin texture in topological insulators

Giant anomalous Josephson effect as a probe of spin texture in topological insulators

Abstract Surface states of topological insulators feature chiral spin-momentum locking. When such states are used as weak link between two superconductors, their spin texture gives rise to the anomalo…

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Josephson anomalous vortices

Josephson anomalous vortices

Abstract We show that vortices with circulating current, related with odd-frequency triplet pairing, appear in Josephson junctions where the barrier is a weak ferromagnet with strong spin-orbit coupli…

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Spontaneous supercurrents and vortex depinning in two-dimensional arrays of 𝜑0 Josephson junctions

Spontaneous supercurrents and vortex depinning in two-dimensional arrays of 𝜑0 Josephson junctions

Abstract Two-dimensional arrays of ballistic Josephson junctions are important as model systems for synthetic quantum materials. Here, we investigate arrays of multiterminal junctions which exhibit a …

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Probing the flat-band limit of the superconducting proximity effect in twisted bilayer graphene Josephson junctions

Probing the flat-band limit of the superconducting proximity effect in twisted bilayer graphene Josephson junctions

Abstract While extensively studied in normal metals, semimetals, and semiconductors, the superconducting (SC) proximity effect remains elusive in the emerging field of flat-band systems. In this study…

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Superconducting junctions with flat bands

Superconducting junctions with flat bands

Abstract We analyze the properties of flat-band superconductor junctions that behave differently from ordinary junctions containing only metals with Fermi surfaces. In particular, we show how in the t…

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Gate-tunable polarity inversions and three-fold rotation symmetry of the superconducting diode effect

Gate-tunable polarity inversions and three-fold rotation symmetry of the superconducting diode effect

Abstract The superconducting diode effect is an asymmetry in the critical current with respect to the supercurrent polarity. One impetus driving recent interest in the effect is its dependence on intr…

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Magnetoelectric effects in diffusive two-dimensional superconductors studied by the nonlinear 𝜎 model

Magnetoelectric effects in diffusive two-dimensional superconductors studied by the nonlinear 𝜎 model

Abstract We describe a numerical approach to modeling magnetoelectric effects generated by spin-orbit coupling in inhomogeneous diffusive two-dimensional (2D) superconductors. It is based on direct mi…

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Superconducting diode effect in diffusive superconductors and Josephson junctions with Rashba spin-orbit coupling

Superconducting diode effect in diffusive superconductors and Josephson junctions with Rashba spin-orbit coupling

Abstract We characterize the superconducting diode effect (SDE) in two-dimensional diffusive structures with Rashba spin-orbit coupling using the quasiclassical formalism. We consider both homogeneous…

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Wafer-scale CMOS-compatible graphene Josephson field-effect transistors

Wafer-scale CMOS-compatible graphene Josephson field-effect transistors

Abstract Electrostatically tunable Josephson field-effect transistors (JoFETs) are one of the most desired building blocks of quantum electronics. Applications of JoFETs range from parametric amplifie…

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Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry

Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry

Abstract In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance. The super…

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Nonreciprocal Josephson Linear Response

Nonreciprocal Josephson Linear Response

Abstract We consider the finite-frequency response of multiterminal Josephson junctions and show how nonreciprocity in them can show up at linear response, in contrast to the static Josephson diodes f…

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