Nanoscale High Transition Temperature Superconducting Quantum Interference Device Transimpedance Amplifier

TL;DR

This paper introduces nanoscale high-temperature superconductor SQUIDs integrated with control lines to create a low-power, wide-temperature-range transimpedance amplifier for quantum electronics applications.

Contribution

It presents the design and integration of 10 nm scale YBCO nano-SQUIDs with control lines to enable efficient superconducting transimpedance amplification across broad temperatures.

Findings

Successful fabrication of 10 nm YBCO nano-SQUIDs.

Integration of nano-SQUIDs with control lines for low power operation.

Demonstration of wide temperature range transimpedance performance.

Abstract

As the quantum generation of electronics takes the stage, a cast of important support electronics is needed to connect these novel devices to our classical worlds. In the case of superconducting electronics, this is a challenge because the Josephson junction devices they are based upon require tiny current pulses to create and manipulate the single flux quanta which guide their operation. Difficulty arises in transitioning these signals through large temperature gradients for connection to semiconductor components. In this work, we present nano superconducting quantum interference devices (SQUID) with critical dimensions as small as 10 nm from the high-transition-temperature superconductor YBa$_2$Cu$_3$O$_{7-\delta}$ (YBCO). We integrate these nano-SQUIDs with nano-isolated inductively coupled control lines to create a low power superconducting output driver capable of transimpedance conversion over a very wide temperature range.