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Updated: Aug 21, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Field-induced boson insulating states in a 2D superconducting electron gas with strong spin-orbit scatterings
Tsofar Maniv1, Vladimir Zhuravlev1
1Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Abstract:
The phenomenon of field-induced superconductor-to-insulator transitions observed experimentally in electron-doped SrTiO3/LaAlO3interfaces, analyzed recently by menas of 2D superconducting fluctuations theory, is revisited with new insights associating it with the appearnace at low temperatures of field-induced boson insulating states. Within the framework of the time-dependent Ginzburg-Landau functional approach, we pinpoint the origin of these states in field-induced extreme softening of fluctuation modes over a large region in momentum space, upon diminishing temperature, which drives Cooper-pair fluctuations to condense into mesoscopic puddles in real space. Dynamical quantum tunneling of Cooper-pair fluctuations out of these puddles, introduced within a phenomenological approach, which break into mobile single-electron states, contains the high-field resistance onset predicted by the exclusive boson theory.
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