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Ferroelectric-driven disorder inducing transition of bosonic insulator-superconductor in TiN/HfZrO heterojunction

Applied Physics Letters, ISSN: 0003-6951, Vol: 123, Issue: 21
2023
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Article Description

Unique quantum states induced by disorders can be characterized by quantum phase transitions in many-body systems. In this study, we experimentally observed a sharp resistance peak near the superconducting transition in superconductor/ferroelectric TiN/HfZrO heterostructures. The peak is attributed to the disorder introduced by ferroelectric fluctuations within the empirical model of metal-boson insulator-superconductor transitions. By modulating the quantum phase transitions in superconductivity and competing with the disorder through ferroelectric polarization, we provide a versatile platform for investigating the influence of ferroelectric materials on superconducting states.

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