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Updated: Oct 29, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Coexistence ofs- andd-wave gaps due to pair-hopping and exchange interactions
1Second Lab, LLC, 19-27 Inarimae, Tsukuba 305-0061, Japan.
Abstract:
I investigate the superconductivity of the three-bandt-J-Umodel derived from the three-band Hubbard model using the Schrieffer-Wolff transformation. My model is designed considering the hole-doped high-Tcsuperconducting cuprate. The model does not exclude the double occupancy of Cu sites bydelectrons, and there is a pair-hopping interaction between thedandpbands together with the exchange interaction. I analyse the superconducting transition temperature, electronic state, and superconducting gap function based on strong coupling theory and find that the superconductivity emerges due to the pair-hopping and exchange interactions via the Suhl-Kondo mechanism. In the superconducting state, the extendeds- anddx2-y2-wave superconducting gaps coexist, where both charge fluctuations andd-pband hybridization are key ingredients.
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