Pressure Driven Fermi surface reconstruction of chromium

TL;DR

This study reveals a significant pressure-induced Fermi surface reconstruction in chromium, driven by a spin-flip transition, with new quantum interference orbits emerging at high pressures and magnetic fields.

Contribution

It provides new insights into how high pressure and magnetic fields induce Fermi surface changes in chromium, highlighting the role of quantum interference effects.

Findings

Multiple new Fermi surface orbits appear above 0.93 GPa.

Field-induced effective masses are approximately 0.06-0.07 me.

Oscillation amplitudes suggest quantum interference rather than Landau quantization.

Abstract

We have observed a massive reconstruction of the Fermi surface of single crystal chromium as a function of high pressure and high magnetic fields caused by the spin-flip transition, with multiple new orbits appearing above 0.93 GPa. Additionally, some orbits have field-induced effective masses of ~0.06-0.07 me, seen only at high magnetic fields. Based on the temperature insensitivity displayed by the oscillation amplitudes at these frequencies, we attribute the orbits to quantum interference rather than to Landau quantization.