Incommensurate Spin Fluctuations in the Spin-Triplet Superconductor Candidate UTe2
Chunruo Duan, Kalyan Sasmal, M. Brian Maple, Andrey Podlesnyak, Jian-Xin Zhu, Qimiao Si, Pengcheng Dai
DOI 10.1103/PhysRevLett.125.237003 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Spin-triplet superconductors are of extensive current interest because they can host topological state and Majorana fermions important for quantum computation. The uranium-based heavy-fermion superconductor UTe2 has been argued as a spin-triplet superconductor similar to UGe2, URhGe, and UCoGe, where the superconducting phase is near (or coexists with) a ferromagnetic (FM) instability and spin-triplet electron pairing is driven by FM spin fluctuations. Here we use neutron scattering to show that, although UTe2 exhibits no static magnetic order down to 0.3 K, its magnetism in the [0,K,L] plane is dominated by incommensurate spin fluctuations near an antiferromagnetic ordering wave vector and extends to at least 2.6 meV. We are able to understand the dominant incommensurate spin fluctuations of UTe2 in terms of its electronic structure calculated using a combined density-functional and dynamic mean-field theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.6 | Pressure unresolved | unknown |
| UGe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | 1.2 GPa | unknown |
| URhGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.25 | Pressure unresolved | unknown |
| UCoGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.425 | Pressure unresolved | unknown |
Similar papers
Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe
similarity 0.99Chunruo Duan et al. · 2020 · arXiv:2008.12377
Source status unknown — claims are unverified
Self-Reconstruction of Order Parameter in Spin-Triplet Superconductor UTe2
similarity 0.97Y. Tokiwa et al.
Source status unknown — claims are unverified
Fermi-Surface Instability in the Heavy-Fermion Superconductor UTe2
similarity 0.96Q. Niu et al.
Source status unknown — claims are unverified
Longitudinal Spin Fluctuations Driving Field-Reinforced Superconductivity in UTe2
similarity 0.95Y. Tokunaga et al.
Source status unknown — claims are unverified
Intimate relationship between spin configuration in the triplet pair and superconductivity in UTe2
similarity 0.95Hiroki Matsumura et al.
Source status unknown — claims are unverified
Electronic structures of ferromagnetic superconductors UGe2 and UCoGe studied by angle-resolved photoelectron spectroscopy
similarity 0.95Shin-ichi Fujimori et al.
Source status unknown — claims are unverified