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.
Highlights
It is highly desirable to operate over a wide cryogenic temperature range to move the power dissipation from 4 K or 10 mK to higher temperature such as the upper 40 K cooling stage in typical refrigeration systems to lower the cooling power required for the system
In this work, we present nanoscale superconducting quantum interference devices (SQUIDs) with dimensions as small as 10 nm from the high-transition-temperature superconductor YBa2Cu3O7Àd (YBCO)
The recent development of focused helium ion beam (FHIB) direct-write nano-lithography of high-TC superconductor (HTS) materials opens the door to devices with nanoscale geometries[8] in YBCO because it does not involve removal or etching of the material
Summary
It is highly desirable to operate over a wide cryogenic temperature range to move the power dissipation from 4 K or 10 mK (in the case of quantum computing) to higher temperature such as the upper 40 K cooling stage in typical refrigeration systems to lower the cooling power required for the system. 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.
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