Probing the phase diagram of cuprates with YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films and nanowires

Abstract

We have grown and characterized 30 nm thick YBa${}_2$Cu${}_3$O${}_{7-\delta }$ (YBCO) films, deposited by pulsed laser deposition on both MgO (110) and SrTiO${}_3$ (001) substrates, which induce opposite strain to the superconducting layer. By carefully tuning the in-situ post-annealing oxygen pressure, we achieved, in a reproducible way, films at different oxygen doping, spanning from the slightly overdoped down to the strongly underdoped region of the phase diagram. The transport properties of the films, investigated through resistance versus temperature measurements, are in perfect qualitative agreement with single crystals. Starting from these films, we have also successfully fabricated nanowires with widths down to 65 nm, at different oxygen doping. The nanostructures exhibit characteristic temperatures (as the critical temperature $T_{\mathrm{c}}$ and the pseudogap temperature $T^{\ast }$) similar to those of the as-grown films and carry critical current densities $J_{\mathrm{c}}$ close to the critical depairing value, limited by vortex entry. This implies that the superconducting and the normal state properties of underdoped YBCO are preserved in our films, and they can be studied as a function of the dimensionality of the system, down to the nanoscale.

11 pages, 9 figures, submitted to Phys. Rev. Materials

References in corpus (9)

• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Thermodynamic evidence for nematic phase transition at the onset of pseudogap in YBa${}_2$Cu${}_3$O${}_y$
• Charge ordering in the electron-doped superconductor Nd2-xCexCuO4
• Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy
• Vortex-induced dissipation in narrow current-biased thin-film superconducting strips
• Two types of nematicity in the phase diagram of the cuprate superconductor YBa${}_2$Cu${}_3$O${}_y$
• Vortex Lattice Melting and Hc2 in underdoped YBa2Cu3Oy
• Transport properties of ultrathin YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanowires: a route to single photon detection
• Coherent transport in extremely underdoped Nd1.2Ba1.8Cu3Oz nanostructures

Cited by in corpus (20)

• Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
• Ultra-high critical current densities of superconducting YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films in the overdoped state
• Charge order at high temperature in cuprate superconductors
• Strange metal behaviour from charge density fluctuations in cuprates
• Restored strange metal phase through suppression of charge density waves in underdoped YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Signature of quantum criticality in cuprates by charge density fluctuations
• Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on Nd${}_{1+x}$Ba${}_{2-x}$Cu${}_3$O${}_{7-\delta }$
• Grooved Dayem nanobridges as building blocks of high-performance YBa${}_2$Cu${}_3$O${}_{7-\delta }$ SQUID magnetometers
• Fabrication and electrical transport characterization of high quality underdoped YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanowires
• Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates
• Untwinned YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films on MgO substrates: a platform to study strain effects on the local orders in cuprates
• Mapping the phase diagram of a YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nanowire through electromigration
• Linear dichroism infrared resonance in over-, under-, and optimally-doped cuprate superconductors
• Coherently strained epitaxial YBa${}_2$Cu${}_3$O${}_{7-\delta }$ films grown on NdGaO${}_3$ (110)
• Thermoelectric transport properties of gapless pinned charge density waves
• Doping dependence of the upper critical field in untwinned YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films
• Fast track to the overdoped regime of superconducting YBa2Cu3O7-δ thin films via electrochemical oxidation
• Precursor superconducting effects in the optimally doped YBa${}_2$Cu${}_3$O${}_{7-\delta }$ superconductor: the confrontation between superconducting fluctuations and percolative effects revisited
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
• Engineering underdoped CuO${}_2$ nanoribbons in nm-thick $a$-axis YBa${}_2$Cu${}_3$O${}_{7-\delta }$ films