Probing the electronic structure of UTe2 with ARPES and high-energy spectroscopy
Abstract
UTe2 has emerged as one of the most intensively studied strongly correlated materials in recent years owing to its unconventional superconductivity and the possible realization of a spin-triplet, topologically nontrivial pairing state. A central open issue concerns the nature of the U 5f electrons and their participation in low-energy quasiparticle states. In this review, we summarize recent spectroscopic studies of UTe2 using momentum-resolved angle-resolved photoemission spectroscopy (ARPES) and element- and configuration-sensitive X-ray probes, including X-ray absorption spectroscopy (XAS), X-ray absorption near-edge structure (XANES), X-ray magnetic circular dichroism (XMCD), resonant X-ray emission spectroscopy (RXES), and resonant inelastic X-ray scattering (RIXS). A key finding is the pronounced technique dependence of the inferred electronic structure. We synthesize the present spectroscopic picture by integrating these results with modern electronic-structure calculations such as density functional theory plus dynamical mean-field theory (DFT+DMFT). These findings support an intermediate-valence ground state with significant admixture of 5f2 and 5f3 configurations in UTe2, and they delineate key experimental and theoretical benchmarks needed to connect the normal-state electronic structure to the superconducting mechanism.
Versions
Related
- Multivalley 3D Electronic Structure of PbSe from Soft-X-Ray ARPES and First-Principles Calculations
- Electronic Structure of Cobalamins Defined by High Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy: Insights into Photochemical Axial Bond Cleavage in the CarH Photoreceptor
- Probing the vibrational and electronic structures of azide contact ion pairs in DMSO with fourier-transform infrared and soft x-ray absorption spectroscopy
- Probing Electronic Structure of Chiral Unsaturated Hydrocarbons at the Carbon Edge
- Electronic Structure and Superconductivity in La1.55Sr0.45CuO4/La2CuO4 Artificial High-Tc Superlattices Probed by Hard and Soft X-ray Spectroscopy
BibTeX
@misc{fujimori2026probing,
title = {{Probing the electronic structure of $\mathrmUTe_2$ with ARPES and high-energy spectroscopy}},
author = {Shin-ichi Fujimori},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.36706},
eprint = {2609.36706},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.36706},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Probing the electronic structure of UTe_2 with ARPES and high-energy spectroscopy
AU - Shin-ichi Fujimori
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2609.36706
UR - https://arxiv.org/abs/2609.36706
AB - UTe_2 has emerged as one of the most intensively studied strongly correlated materials in recent years owing to its unconventional superconductivity and the possible realization of a spin-triplet, topologically nontrivial pairing state. A central open issue concerns the nature of the U 5f electrons and their participation in low-energy quasiparticle states. In this review, we summarize recent spectroscopic studies of UTe_2 using momentum-resolved angle-resolved photoemission spectroscopy (ARPES) and element- and configuration-sensitive X-ray probes, including X-ray absorption spectroscopy (XAS), X-ray absorption near-edge structure (XANES), X-ray magnetic circular dichroism (XMCD), resonant X-ray emission spectroscopy (RXES), and resonant inelastic X-ray scattering (RIXS). A key finding is the pronounced technique dependence of the inferred electronic structure. We synthesize the present spectroscopic picture by integrating these results with modern electronic-structure calculations such as density functional theory plus dynamical mean-field theory (DFT+DMFT). These findings support an intermediate-valence ground state with significant admixture of 5f^2 and 5f^3 configurations in UTe_2, and they delineate key experimental and theoretical benchmarks needed to connect the normal-state electronic structure to the superconducting mechanism.
ER -