Negligible oxygen vacancies, low critical current density, electric-field modulation, in-plane anisotropic and high-field transport of a superconducting Nd0.8Sr0.2NiO2/SrTiO3 heterostructure

Abstract

The emerging Ni-based superconducting oxide thin films are rather intriguing to the entire condensed matter physics. Here we report some brief experimental results on transport measurements for a 14-nm-thick superconducting Nd0.8Sr0.2NiO2/SrTiO3 thin-film heterostructure with an onset transition temperature of ~9.5 K. Photoluminescence measurements reveal that there is negligible oxygen vacancy creation in the SrTiO3 substrate during thin-film deposition and post chemical reduction for the Nd0.8Sr0.2NiO2/SrTiO3 heterostructure. It was found that the critical current density of the Nd0.8Sr0.2NiO2/SrTiO3 thin-film heterostructure is relatively small, ~4x10^3 A/cm2. Although the surface steps of SrTiO3 substrates lead to an anisotropy for in-plane resistivity, the superconducting transition temperatures are almost the same. The out-of-plane magnetotransport measurements yield an upper critical field of ~11.4 T and an estimated in-plane Ginzburg-Landau coherence length of ~5.4 nm. High-field magnetotransport measurements up to 50 T reveal anisotropic critical fields at 1.8 K for three different measurement geometries and a complicated Hall effect. An electric field applied via the SrTiO3 substrate slightly varies the superconducting transition temperature. These experimental results could be useful for this rapidly developing field.

arXiv comment14 pages, 8 figures. Some typos are corrected and new references are included

References in corpus (51)

• Superconducting Dome in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ Infinite Layer Films
• Phase diagram and superconducting dome of infinite-layer $\mathrm{N}{\mathrm{d}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{r}}_{\mathrm{x}}\mathrm{Ni}{\mathrm{O}}_2$ thin films
• A superconducting praseodymium nickelate with infinite layer structure
• Formation of 2D single-component correlated electron system and band engineering in the nickelate superconductor NdNiO2
• Self-doped Mott insulator for parent compounds of nickelate superconductors
• The critical nature of the Ni spin state in doped NdNiO${}_2$
• Robust $d_{x^2-y^2}$-wave superconductivity of infinite-layer nickelates
• Origin of the two-dimensional electron gas at LaAlO3/SrTiO3 interfaces: The role of oxygen vacancies and electronic reconstruction
• Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
• A Piezoelectric, Strain-Controlled Antiferromagnetic Memory Insensitive to Magnetic Fields
• Two superconducting components with different symmetries in Nd1-xSrxNiO2 films
• Aspects of the Synthesis of Thin Film Superconducting Infinite-Layer Nickelates
• Nickelate superconductors $--$ Multiorbital nature and spin freezing
• Absence of superconductivity in bulk Nd${}_{1-x}$Sr${}_x$NiO${}_2$
• Electric-Field-Controlled Antiferromagnetic Spintronic Devices
• Topotactic hydrogen in nickelate superconductors and akin infinite-layer oxides ABO2
• A substantial hybridization between correlated Ni-d orbital and itinerant electrons in infinite-layer nickelates
• Carrier freeze-out induced metal-insulator transition in oxygen deficient SrTiO3 films
• Synthesis and characterization of bulk Nd1-xSrxNiO2 and Nd1-xSrxNiO3
• Electronic structure of rare-earth infinite-layer ReNiO2 (Re=La, Nd)
• Hund's metal physics: from SrNiO${}_2$ to NdNiO${}_2$
• Induced magnetic two-dimensionality by hole doping in the superconducting infinite-layer nickelate Nd${}_{1-x}$Sr${}_x$NiO${}_2$
• Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy
• Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates
• Multiorbital processes rule the Nd${}_{1-x}$Sr${}_x$NiO${}_2$ normal state
• Lifshitz transition and frustration of magnetic moments in infinite-layer NdNiO${}_2$ upon hole-doping
• Antiferromagnetic Piezospintronics
• Isotropic Pauli-Limited Superconductivity in the Infinite Layer Nickelate Nd${}_{0.775}$Sr${}_{0.225}$NiO${}_2$
• Distinct pairing symmetries of superconductivity in infinite-layer nickelates
• Electric-Field Control of Magnetic Order: From FeRh to Topological Antiferromagnetic Spintronics
• Fundamental difference in the electronic reconstruction of infinite-layer vs. perovskite neodymium nickelate films on SrTiO${}_3$(001)
• Normal state of Nd${}_{1-x}$Sr${}_x$NiO${}_2$ from self-consistent $GW$+EDMFT
• Calculated Exchange Interactions and Sensitivity of Ni Two-Hole Spin State to Hund's Coupling in Doped NdNiO2
• Noncollinear Spintronics and Electric-Field Control: A Review
• Similarities and differences between nickelate and cuprate films grown on a SrTiO${}_3$ substrate
• Integration of the Noncollinear Antiferromagnetic Metal Mn3Sn onto Ferroelectric Oxides for Electric-Field Control
• Preparation of superconducting thin films of infinite-layer nickelate Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$
• Giant Piezospintronic Effect in a Noncollinear Antiferromagnetic Metal
• Electronic correlations and magnetic interactions in infinite-layer NdNiO${}_2$
• Superconductivity in Infinite-layer Nickelates : Role of Non-zero f-ness
• Theoretical investigation of superconductivity in trilayer square-planar nickelates
• Polarity induced electronic and atomic reconstruction at NdNiO2/SrTiO3 interfaces
• Reversible room-temperature ferromagnetism in Nb-doped SrTiO3 single crystals
• Effects of Sr-doping on the electronic and spin-state properties of infinite-layer nickelates
• Doping dependence of electronic structure of infinite-layer NdNiO2
• Physical properties revealed by transport measurements on superconducting Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ thin films
• Absence of Superconductivity in Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_x$ Thin Films without Chemical Reduction
• Synthesis and physical properties of perovskite Sm${}_{1-x}$Sr${}_x$NiO${}_3$ (x = 0, 0.2) and infinite-layer Sm${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ nickelates
• A two-dimensional electron gas based on a 5s oxide with high room-temperature mobility and strain sensitivity
• Surface $s$-wave superconductivity for oxide-terminated infinite-layer nickelates
• In-plane p-wave coherence length in iron-based superconductors

Cited by in corpus (14)

• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• Superconductivity in infinite-layer nickelates
• Observation of perfect diamagnetism and interfacial effect on the electronic structures in Nd0.8Sr0.2NiO2 superconducting infinite layers
• Reconstructing the polar interface of infinite-layer nickelate thin films
• Impact of Cation Stoichiometry on the Crystalline Structure and Superconductivity in Nickelates
• Topotactic Transition: A Promising Opportunity for Creating New Oxides
• Antiferromagnetism in Ni-Based Superconductors
• Experimental Progress on the Emergent Infinite-Layer Ni-Based Superconductors
• Limits to the strain engineering of layered square-planar nickelate thin films
• Stability of Superconducting Nd0.8Sr0.2NiO2 Thin Films
• Epitaxial Integration of a Perpendicularly Magnetized Ferrimagnetic Metal on a Ferroelectric oxide for Electric-Field Control
• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• Intrinsic coherence length anisotropy in nickelate, and some pnictide, and chalcogenide superconductors
• Achieving superconductivity in infinite-layer nickelate thin films by aluminum sputtering deposition