Anomalous metals: From "failed superconductor" to "failed insulator".

ABSTRACT: Resistivity saturation is found on both superconducting and insulating sides of an "avoided" magnetic-field-tuned superconductor-to-insulator transition (H-SIT) in a two-dimensional In/InO_x composite, where the anomalous metallic behavior cuts off conductivity or resistivity divergence in the zero-temperature limit. The granular morphology of the material implies a system of Josephson junctions (JJs) with a broad distribution of Josephson coupling E_J and charging energy E_C, with an H-SIT determined by the competition between E_J and E_C. By virtue of self-duality across the true H-SIT, we invoke macroscopic quantum tunneling effects to explain the temperature-independent resistance where the "failed sup

SUBMITTER: Zhang X 

PROVIDER: S-EPMC9304025 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature