An Extended Anderson Model that shows Decreasing Resistivity with Decreasing Temperature

TL;DR

This paper investigates an extended two-channel Anderson model, revealing that resistivity decreases logarithmically with temperature and exhibits a T^1/2 anomaly at very low temperatures, aligning with observations in dilute U alloys.

Contribution

It introduces an extended Anderson model that captures the temperature-dependent resistivity and spectral features observed in dilute uranium alloys.

Findings

Resistivity decreases logarithmically as temperature drops.

Resistivity shows a T^1/2 anomaly at very low temperatures.

Single-particle and spin excitation spectra are calculated.

Abstract

The resistivity for an extended two channel Anderson model is calculated. When the temperature decreases, it decreases logarithmically, and has T^1/2 anomaly at very low temperatures, as seen in some dilute U alloys. The single-particle and the spin excitation spectra are also calculated.