First observation of quantum oscillations by transport measurements in semi-destructive pulsed magnetic fields up to 125 T

TL;DR

This paper reports the development of a microwave transport measurement technique capable of operating in ultra-high pulsed magnetic fields up to 125 T, enabling the first observation of quantum oscillations in WTe₂ at such extreme fields.

Contribution

It introduces a novel microwave measurement setup for high-field pulsed environments and demonstrates its effectiveness through groundbreaking observations in WTe₂.

Findings

First observation of Shubnikov-de-Haas oscillations in WTe₂ above 100 T

Detection of metal-insulator transition in InAs

Development of sensitive measurement technique for ultra-high magnetic fields

Abstract

High magnetic fields have proven instrumental in exploring the physical properties of condensed matter, leading to groundbreaking discoveries such as the quantum Hall effect in 2D heterostructures and quantum oscillations in cuprate superconductors. The ability to conduct precise measurements at progressively higher magnetic fields continues to push the frontiers of knowledge and enable new discoveries. In this work, we present the development of a microwave technique for performing two-point transport measurements in semi-destructive pulsed magnetic fields (up to 125 T) and at low temperatures (down to 1.5 K) with unprecedented sensitivity. This new setup was tested on a variety of samples. We present results on the metal-insulator transition in InAs and we report notably the first observation of Shubnikov-de-Haas oscillations in WTe$_{2}$ at magnetic fields beyond 100 T.