Fermi surface of the colossal magnetoresistance perovskite La_{0.7}Sr_{0.3}MnO_{3}

TL;DR

This paper provides the first experimental visualization of the Fermi surface in a CMR perovskite, supported by calculations, revealing a cubic shape that may facilitate nesting and influence magnetoresistance.

Contribution

It presents the first experimental Fermi surface data for La_{0.7}Sr_{0.3}MnO_{3} using photon angular correlation, complemented by electronic structure calculations.

Findings

Fermi surface is sufficiently cubic to support nesting

Experimental data obtained via photon angular correlation of electron-positron annihilation

Supported by virtual crystal electronic structure calculations

Abstract

Materials that exhibit colossal magnetoresistance (CMR) are currently the focus of an intense research effort, driven by the technological applications that their sensitivity lends them to. Using the angular correlation of photons from electron-positron annihilation, we present a first glimpse of the Fermi surface of a material that exhibits CMR, supported by ``virtual crystal'' electronic structure calculations. The Fermi surface is shown to be sufficiently cubic in nature that it is likely to support nesting.