Phase Instability in Multi-band Superconductors

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概要

• 論文の詳細を見る

• When a superconductor has multiple bands and there is a phase difference of π between Δ1 and Δ2 where Δi is a gap parameter on a band indexed by i, the junction formed with another superconductor rotates the relative phase between Δ1 and Δ2 near the interface to lower the Josephson coupling energy. This means that the order parameter is no longer a real number but is a complex number. This phase-instability is demonstrated with a simple model describing the two-band superconductor in terms of the Ginzburg–Landau theory. Due to this effect there is a phase shift between the two bulk superconductors forming the junction. Using a quantum interferometer we will be able to detect this shift experimentally.

• Physical Society of Japanの論文
• 2001-10-15

著者

• TANAKA Yasumoto

  National Institute of Advanced Industrial Science and Technology

• Tanaka Yasumoto

  National Institute of Advanced Industrial Science and Technology (AIST),

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