Signatures of electronic correlations and spin-susceptibility anisotropy in nuclear magnetic resonance

TL;DR

This paper introduces a minimally-invasive NMR method to analyze electronic susceptibility and its anisotropy by examining spin echo responses, offering insights into electronic phases and magnetic properties.

Contribution

It presents a novel NMR-based approach to probe electronic susceptibility and anisotropy through spin echo experiments, providing a new tool for studying electronic phases.

Findings

Pulse strength and field orientation reveal susceptibility anisotropy.

Method offers an alternative explanation for NMR results in complex systems.

Applicable to sensing emergent electronic phases.

Abstract

We present a methodology for probing the details of electronic susceptibility through minimally-invasive nuclear magnetic resonance techniques. Specifically, we classify electron-mediated long-range interactions in an ensemble of nuclear spins by revealing their effect on simple spin echo experiments. We find that pulse strength and applied field orientation dependence of these spin echo measurements resolves the spatial extent and anisotropy of electronic spin susceptibility. This work provides an alternate explanation to NMR results in superconducting and magnetically-ordered systems. The methodology has direct applications for sensing and characterizing emergent electronic phases.