Magnetization measurements of Sr<sub>2</sub>RuO<sub>4</sub>-Ru eutectic microplates using dc-SQUIDs

Applying a radian phase shift other than 2π is a key issue for superconducting circuits, such as flux qubits. The magnetic flux is useful when generating a phase shift. However, a quantized magnetic flux accompanying a trapped vortex in a superconductor does not have a phase shifter function. The magnetic flux generated by an external field generates noise. In this study, we propose a phase bias system that does not require an external field during operation. We confirm the phase shift of a direct current superconducting interference device (SQUID) placed on an ultrathin superconducting Nb bilayer with a through-hole by cooling it to a temperature below the superconducting transition temperature with an external field. Although the cause of the phase shift in our system is unclear, we believe that it may be caused by a fractional quantum in the bilayer. When the SQUID is replaced by a qubit, the phase shift can be applied to a phase bias.

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“…Similarly, changes in the period have been observed in the Sr 2 RuO 4 -Ru eutectic microplates with a micro-DC-SQUID [18].…”

Section: Resultssupporting

confidence: 61%

“…The direct combination of a SQUID and target to produce a magnetic flux has been attempted in other multicomponent superconductors to attain a fractional vortex [18]. However, with the exception of one of our previous publications [16], to our knowledge, there is no other report on the identification of the fractional vortex.…”

Section: Introductionmentioning

confidence: 99%

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Ishizu

Yamamori

Arisawa

et al. 2021

Preprint

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show abstract

“…Φ ̃0 has the following relationship with Φ 0 : Φ ̃0 ≈ 1.39Φ 0 . Similarly, changes in the period have been observed in the Sr2RuO4-Ru eutectic microplates with a micro-DC-SQUID [18].…”

Section: Resultssupporting

confidence: 60%

“…The direct combination of a SQUID and target to produce a magnetic flux has been attempted in other multicomponent superconductors to attain a fractional vortex [18].…”

Section: Introductionmentioning

confidence: 99%

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Ishizu

Yamamori

Arisawa

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Magnetization measurements of Sr₂RuO₄-Ru eutectic microplates using dc-SQUIDs

Cited by 2 publications

References 14 publications

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

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Magnetization measurements of Sr2RuO4-Ru eutectic microplates using dc-SQUIDs

Cited by 2 publications

References 14 publications

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

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Magnetization measurements of Sr₂RuO₄-Ru eutectic microplates using dc-SQUIDs