Anomalous Behavior at a Superconducting Quantum Critical Point

TL;DR

This paper explores the unique low-temperature behaviors near a superconducting quantum critical point, proposing experimental diagnostics to distinguish non-BCS mechanisms of superconductivity in clean systems.

Contribution

It introduces a framework for identifying non-BCS superconducting mechanisms through pressure-induced quantum critical point measurements.

Findings

Quantum critical point affects low-temperature pairing interactions.

Measurements can differentiate BCS and non-BCS mechanisms.

Provides a diagnostic tool for superconductivity research.

Abstract

Motivated by pressure experiments on UBe_{13} and Tl_{2}Ba_{2}CaCu_{2}O_8, we discuss low-temperature effects of the pairing interaction at a superconducting quantum critical point in a clean system. We point out that measurements at this quantum critical point can provide a diagnostic tool to mark out non-BCS mechanisms of superconductivity.