Striped electronic phases in an incommensurately modulated van der Waals superlattice

Abstract

Electronic properties of crystals can be manipulated using spatially periodic modulations. Long-wavelength, incommensurate modulations are of particular interest, exemplified recently by moiré patterned van der Waals (vdW) heterostructures. Bulk vdW superlattices hosting interfaces between clean 2D layers represent scalable bulk analogs of vdW heterostructures and present a complementary venue to explore incommensurately modulated 2D states. Here we report the bulk vdW superlattice SrTa${}_2$S${}_5$ realizing an incommensurate 1D modulation of 2D transition metal dichalcogenide (TMD) $H$-TaS${}_2$ layers. High-quality electronic transport in the $H$-TaS${}_2$ layers, evidenced by quantum oscillations, is made anisotropic by the modulation and shows commensurability oscillations akin to lithographically modulated 2D systems. We also find unconventional, clean-limit superconductivity (SC) in SrTa${}_2$S${}_5$ with a pronounced suppression of interlayer coherence relative to intralayer coherence. Such a hierarchy can arise from pair-density wave (PDW) SC with mismatched spatial arrangement in adjacent superconducting layers. Examining the in-plane magnetic field $H_{ab}$ dependence of interlayer critical current density $J_c$, we find anisotropy with respect to $H_{ab}$ orientation: $J_c$ is maximized (minimized) when $H_{ab}$ is perpendicular (parallel) to the stripes, consistent with 1D PDW SC. From diffraction we find the structural modulation is shifted between adjacent $H$-TaS${}_2$ layers, suggesting mismatched 1D PDW is seeded by the striped structure. With a high-mobility Fermi liquid in a coherently modulated structure, SrTa${}_2$S${}_5$ is a promising host for novel phenomena anticipated in clean, striped metals and superconductors. More broadly, SrTa${}_2$S${}_5$ establishes bulk vdW superlattices as macroscopic platforms to address long-standing predictions for modulated electronic phases.

arXiv comment19 pages, 4 figures

References in corpus (33)

• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Moire bands in twisted double-layer graphene
• Intrinsic quantized anomalous Hall effect in a moiré heterostructure
• Theory of Intertwined Orders in High Temperature Superconductors
• Lattice relaxation and energy band modulation in twisted bilayer graphenes
• Quantum anomalous Hall effect from intertwined moiré bands
• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Electronic crystals: an experimental overview
• Electrical Resistivity Anisotropy from Self-Organized One-Dimensionality in High-Temperature Superconductors
• Unfolding first-principles band structures
• Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
• Dynamical layer decoupling in a stripe-ordered, high T_c superconductor
• A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
• The Ground State of the Pseudogap in Cuprate Superconductors
• Moiré quantum chemistry: charge transfer in transition metal dichalcogenide superlattices
• Twistons in a Sea of Magic
• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Nematic phase of the two-dimensional electron gas in a magnetic field
• Clean 2D superconductivity in a bulk van der Waals superlattice
• Detection of a Pair Density Wave State in UTe${}_2$
• Neutron diffraction study of stripe order in La(2)NiO(4+d) with d=2/15
• Discovery of a pair density wave state in a monolayer high-Tc iron-based superconductor
• Cuprate superconductors as viewed through a striped lens
• Smectic Pair Density Wave Order in EuRbFe4As4
• Magnetic memory and spontaneous vortices in a van der Waals superconductor
• Josephson Effect in Fulde-Ferrell-Larkin-Ovchinnikov Superconductors
• Brown-Zak and Weiss oscillations in a gate-tunable graphene superlattice: A unified picture of miniband conductivity
• Theory of quantum oscillations in quasicrystals: Quantizing spiral Fermi surfaces
• London penetration depth measurements using tunnel diode resonators
• Testing for pair-density-wave order in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
• Crossover from itinerant to localized states in the thermoelectric oxide [Ca${}_2$CoO${}_3$]${}_{0.62}$[CoO${}_2$]
• Detection of Striped Superconductors Using Magnetic Field Modulated Josephson Effect
• Effect of Landau quantization on linear magnetoresistance of periodically modulated two-dimensional electron gas

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