Quantum sensing with diamond NV centers under megabar pressures

TL;DR

This paper demonstrates the use of diamond NV centers for in-situ magnetic sensing at pressures up to 1.4 megabar, enabling quantum sensing under extreme conditions relevant to condensed matter physics and geophysics.

Contribution

It extends the operational pressure range of diamond NV center quantum sensors to the megabar regime, showing their potential for high-pressure scientific studies.

Findings

NV fluorescence shifts under high pressure

Coherent manipulation of NV spins at megabar pressures

Successful magnetic sensing up to 1.4 Mbar

Abstract

Megabar pressures are of crucial importance for cutting-edge studies of condensed matter physics and geophysics. With the development of diamond anvil cell, laboratory studies of high pressure have entered the megabar era for decades. However, it is still challenging to implement in-situ magnetic sensing under ultrahigh pressures. Here, we demonstrate optically detected magnetic resonance of diamond nitrogen-vacancy (NV) centers, a promising quantum sensor of strain and magnetic fields, up to 1.4 Mbar. We quantify the reduction and blueshifts of NV fluorescence under high pressures. We demonstrate coherent manipulation of NV electron spins and extend its working pressure to the megabar region. These results shed new light on our understanding of diamond NV centers and will benefit quantum sensing under extreme conditions.