# Dissipative-regime measurements as a tool for confirming and characterizing near-room-temperature superconductivity

## TL;DR

This paper introduces dissipative-regime measurements as a novel, rapid method to confirm and characterize near-room-temperature superconductivity, especially in small or incomplete samples where traditional signatures are weak or absent.

## Contribution

It presents a new set of fast-timescale, dissipative transport measurement techniques that enhance the detection and analysis of superconductivity in challenging conditions.

## Key findings

- Dissipative measurements can identify superconductivity without complete zero resistance.
- The methods are effective for small-volume or trace superconducting phases.
- These techniques complement existing signatures like Meissner effect and resistance drop.

## Abstract

The search for new superconducting materials approaching room temperature benefits from having a variety of testing methodologies to confirm and characterize the presence of superconductivity. Often the first signatures of new superconducting species occur incompletely and in very small volume fractions. These trace amounts may be too weak to produce an observable Meissner effect and the resistance may not go completely to zero if the percolation threshold is not met. Under these conditions, secondary behavior--such as transitions or cross overs in the temperature dependence of magnetoresistance, magnetic irreversibility, or thermopower--are often used as indications for the presence of superconductivity. Our group has developed a rather unique set of fast-timescale and dissipative transport measurements that can provide another tool set for confirming and characterizing suspected superconductivity. Here we provide some background for these methods and elucidate their collaborative value in the search for new superconducting materials. Keywords: pairbreaking, pair-breaking, vortex, vortices, theory, tutorial, RTS, room-temperature superconductivity, superconductor, detection, characterization