Derivation of the Ultra-Low-Temperature Resistivity Exponent in DO3-Fe3Ga

Derive the observed ultra-low-temperature resistivity exponent n = 1.53 in DO3-Fe3Ga from a framework consistent with band-structure calculations and available experimental data, thereby establishing a microscopic understanding of the non-Fermi-liquid transport in this material.

Background

Transport measurements on high-quality DO3-Fe3Ga crystals reveal a resistivity temperature dependence with exponent n ≈ 1.53 at dilution temperatures, signaling non-Fermi-liquid behavior.

The authors note that existing band-structure calculations and current experimental data do not directly account for this exponent, highlighting a gap between observations and theoretical description.

References

Although the ultra-low-temperature resistivity exponent n = 1.53 cannot be directly derived from existing band-structure calculations or from current experimental data, the placement of our low-temperature resistivity coefficient A on the unified Kadowaki-Woods scaling plot suggests that the present sample already exhibits clear signatures of non-Fermi-liquid (NFL) behavior.

— Robust Flat Magnetoresistivity in D0$_3$-Fe$_3$Ga Driven by Chiral Anomaly  (2603.29138 - Wang et al., 31 Mar 2026) in Supplementary Information, Section S5 (The Kadowaki-Woods Scaling Plot), preceding paragraph