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

Abstract

Spatial scanning of the synchronously generated 2nd and 3rd order intermodulation distortion in superconducting resonators uncovers local nonlinearity hot spots, and possible time reversal symmetry breaking, using a simple probe fashioned from coaxial cable. It is clear that even and odd order nonlinearity in these samples do not share the same physical origins, as their temperature and static magnetic field dependences are quite different. 2nd order intermodulation distortion (IMD) remains strong in these measurements as the temperature continues to drop below TC to 77K even though the 3rd order peaks near TC and becomes smaller at lower temperature as predicted by the nonlinear Meissner effect. Both YBa2Cu3O7 and Tl2Ba2CaCu2O8 resonators of the same structure exhibit similar temperature dependence in the 2nd order with 2nd order remaining high at lower temperature. The YBa2Cu3O7 sample has lower 3rd order IMD with a pronounced peak at TC.

References in corpus (6)

• Proposal for an Experiment to Test a Theory of High Temperature 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
• Spatially Resolved Nonlinearity Measurements of YBa${}_2$Cu${}_3$O${}_{7-d}$ Bi-crystal Grain Boundaries
• Effect of LaAlO3 twin-domain topology on local dc and microwave properties of cuprate films
• Intrinsic nonlinearity probed by intermodulation distortion microwave measurements on high quality MgB2 thin films

Cited by in corpus (3)

• Microwave Nonlinearity and Photoresponse of Superconducting Resonators with Columnar Defect Micro-Channels
• Local Whole-Device Scanning of Distortion in Superconducting Microwave Resonators
• Relaxation of Microwave Nonlinearity in a Cuprate Superconducting Resonator