High-field superconducting halo in UTe2
成果类型：
Article
署名作者：
Lewin, Sylvia K.; Czajka, Peter; Frank, Corey E.; Saucedo Salas, Gicela; Noe II, G. Timothy; Yoon, Hyeok; Eo, Yun Suk; Paglione, Johnpierre; Nevidomskyy, Andriy H.; Singleton, John; Butch, Nicholas P.
署名单位：
National Institute of Standards & Technology (NIST) - USA; University System of Maryland; University of Maryland College Park; United States Department of Energy (DOE); Los Alamos National Laboratory; Canadian Institute for Advanced Research (CIFAR); Rice University; Rice University; Rice University
刊物名称：
SCIENCE
ISSN/ISSBN：
0036-8084
DOI：
10.1126/science.adn7673
发表日期：
2025-07-31
页码：
512-515
关键词：
摘要：
The heavy fermion material UTe2 is a candidate topological superconductor that exhibits multiple magnetic field-induced superconducting phases. One such phase exists only at fields greater than 40 tesla, a considerable scale given its critical temperature of only 2 K. Here, we extend measurements of this state with fields outside of the bc crystallographic plane and reveal its core structure: The superconducting phase wraps around the b axis in a halo-like fashion and appears to be stabilized by a field component perpendicular to the magnetic easy axis. This angle dependence points to a multicomponent spin-triplet order parameter with a finite angular momentum of the Cooper pairs. The pairing mechanism remains enigmatic, and UTe2's specific magnetophilic superconducting tendencies seem incompatible with existing models for field-enhanced superconductivity.