Effect of LaAlO3 twin-domain topology on local dc and microwave properties of cuprate films

Abstract

Different imaging modes of low temperature laser scanning microscopy (LTLSM) have been applied to probe local optical and superconducting properties, as well as the spatial variations in thermoelectric and electronic (both dc and rf) transport, in a YBa_2Cu_3O_6.95 /LaAlO_3 (YBCO/LAO) superconducting microstrip resonator with micron-range resolution. Additionally, the local sources of microwave nonlinearity (NL) were mapped in two-dimensions simultaneously by using the LTLSM in two-tone rf intermodulation distortion contrast mode as a function of (x,y) position of the laser beam perturbation on the sample. The influence of the direction of individual twin-domain YBCO blocks on its NL properties was analyzed in detail. The result shows the direct spatial correlation between NL microwave and dc electronic transport properties of the YBCO film that are imposed by the underlying twin-domain topology of the LAO substrate. In these circumstances, the scale of local NL current densities J_IM(x,y) in different areas of the YBCO microstrip quantitatively coincide with the scale of local critical current densities J_c(x,y) measured at the same positions.

arXiv comment10 pages, 11 figures

References in corpus (10)

• Laser Scanning Microscopy of HTS Films and Devices
• Hydrodynamic Instability of the Flux-antiflux Interface in Type-II Superconductors
• Doping-Dependent Nonlinear Meissner Effect and Spontaneous Currents in High-Tc Superconductors
• Effect of LaAlO${}_3$ Surface Topography on RF Current Distribution in Superconducting Microwave Devices
• Measurement of Local Reactive and Resistive Photoresponse of a Superconducting Microwave Device
• Imaging Local Sources of Intermodulation in Superconducting Microwave Devices
• Imaging of Microscopic Sources of Resistive and Reactive Nonlinearities in Superconducting Microwave Devices
• Enhanced flux pinning in YBa2Cu3O7-d films by nano-scaled substrate surface roughness
• Microwave Current Imaging in Passive HTS Components by Low-Temperature Laser Scanning Microscopy (LTLSM)
• Transport properties of ybco thin films near the critical state with no applied field

Cited by in corpus (14)

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• Unconventional rf photoresponse from a superconducting spiral resonator
• Imaging the Anisotropic Nonlinear Meissner Effect in Nodal YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin-Film Superconductors
• Tuning microwave losses in superconducting resonators
• High-Temperature Superconducting Multi-Band Radio-Frequency Metamaterial Atoms
• 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
• Microwave Nonlinearity and Photoresponse of Superconducting Resonators with Columnar Defect Micro-Channels
• Low temperature laser scanning microscopy of a superconducting radio-frequency cavity
• Imaging the paramagnetic nonlinear Meissner effect in nodal gap superconductor
• Ternary Metal Oxide Substrates for Superconducting Circuits
• Probing the Locally Generated Even and Odd Order Nonlinearity in Y-Ba-Cu-O and Tl-Ba-Ca-Cu-O (2212) Microwave Resonators around TC
• Tuning of Strong Nonlinearity in rf SQUID Meta-Atoms