High-transition-temperature nanoscale superconducting quantum interference devices directly written with a focused helium ion beam
Hao Li, Han Cai, Ethan Y. Cho, Stephen J. McCoy, Yan-Ting Wang, Jay C. LeFebvre, Yuchao Zhou, Shane A. Cybart
Abstract
In this work, we present nanoscale superconducting quantum interference devices (SQUIDs) with dimensions as small as 10 nm from the high-transition-temperature superconductor YBa2Cu3O7−δ (YBCO). The SQUID features and Josephson junctions are directly written into a 35-nm thick YBCO film with a focused helium ion beam. We integrate these nano-SQUIDs with directly written nano-isolated inductively coupled control lines to demonstrate a low power superconducting output driver capable of transimpedance conversion over a very wide temperature range of 4–50 K.
Topics & Concepts
SquidSuperconductivityJosephson effectFocused ion beamMaterials scienceNanoscopic scaleCondensed matter physicsIon beamOptoelectronicsTransition temperatureNanowireIonNanotechnologyPhysicsBiologyQuantum mechanicsEcologyPhysics of Superconductivity and MagnetismQuantum and electron transport phenomenaSemiconductor materials and devices