Presentation Information
[EDP1-02]Fabrication and Properties of integrated crystal-coupled SQUID for proximity detection of Time-Reversal Symmetry-Broken Superconductors
*Hirotake Yamamori1,2, Mitsuhiro Teshigawara3, Makoto Ono3, Rikizo Yano3, Yasunori Mawatari1, Satoshi Kashiwaya3 (1. AIST (Japan), 2. NAOJ (Japan), 3. Nagoya University (Japan))
Keywords:
SQUID,chiral p-wave symmetry,Time-Reversal Symmetry,Planarization process,proximity detection
[Purpose]
We report on the fabrication and properties of a chip-based superconducting quantum interference device (SQUID) tailored to detect broken time-reversal symmetry (TRS) in unconventional superconductors. TRS breaking can give rise to spontaneous magnetic fields or anomalous flux quantization associated with complex superconducting order parameters such as chiral p-wave symmetry.
[Method]
Our device features a planar SQUID layout with high magnetic sensitivity, onto which superconducting samples are directly placed to maximize coupling between the sample and the SQUID loop.
[Results]
This configuration enables the detection of minute spontaneous magnetic signals originating from TRS-breaking superconductors, such as Sr2RuO4 and UPt3, without the need for a scanning mechanism.
[Consideration]
The direct placement of samples onto the planar SQUID provides strong magnetic coupling, allowing effective detection of weak TRS-breaking signatures. This approach eliminates the complexity of scanning probes while maintaining high sensitivity.
[Conclusion]
This platform also provides a compact and sensitive method for probing the magnetization of crystals several microns in size.
We report on the fabrication and properties of a chip-based superconducting quantum interference device (SQUID) tailored to detect broken time-reversal symmetry (TRS) in unconventional superconductors. TRS breaking can give rise to spontaneous magnetic fields or anomalous flux quantization associated with complex superconducting order parameters such as chiral p-wave symmetry.
[Method]
Our device features a planar SQUID layout with high magnetic sensitivity, onto which superconducting samples are directly placed to maximize coupling between the sample and the SQUID loop.
[Results]
This configuration enables the detection of minute spontaneous magnetic signals originating from TRS-breaking superconductors, such as Sr2RuO4 and UPt3, without the need for a scanning mechanism.
[Consideration]
The direct placement of samples onto the planar SQUID provides strong magnetic coupling, allowing effective detection of weak TRS-breaking signatures. This approach eliminates the complexity of scanning probes while maintaining high sensitivity.
[Conclusion]
This platform also provides a compact and sensitive method for probing the magnetization of crystals several microns in size.