Fermi surface and heavy masses for UPd$_2$Al$_3$

TL;DR

This paper calculates the Fermi surface and heavy electron masses in UPd2Al3 using a localized two-electron model, achieving good experimental agreement with minimal adjustable parameters.

Contribution

It introduces a model with two localized 5f electrons to accurately predict Fermi surface and mass anisotropy in UPd2Al3, with justification for electron localization.

Findings

Good agreement with experimental Fermi surface data

Heavy masses are explained by electron localization

Minimal adjustable parameter needed for accurate results

Abstract

We calculate the Fermi surface and the anisotropic heavy masses of UPd2Al3 by keeping two of the 5f electrons as localized. Good agreement with experiments is found. The theory contains essentially no adjustable parameter except for a small shift of the position of the Fermi energy of the order of a few meV. A discussion is given why localization of two f electrons is justified.