تقرير
High-Field Superconducting Halo in UTe$_2$
| العنوان: | High-Field Superconducting Halo in UTe$_2$ |
|---|---|
| المؤلفون: | Lewin, Sylvia K., Czajka, Peter, Frank, Corey E., Salas, Gicela Saucedo, Yoon, Hyeok, Eo, Yun Suk, Paglione, Johnpierre, Nevidomskyy, Andriy H., Singleton, John, Butch, Nicholas P. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Heavy fermion UTe$_2$ is a promising candidate for topological superconductivity that also exhibits multiple high-field superconducting phases. The SC$_{\rm{FP}}$ phase has only been observed in off-axis magnetic fields in the $bc$ plane at fields greater than 40 teslas, a striking scale given its critical temperature of only 2 kelvins. Here, we extend measurements of this unique superconducting state outside of the $bc$ plane and reveal its core structure. The SC$_{\rm{FP}}$ phase is not confined to fields in the $bc$ plane and in fact wraps around the $b$ axis in a halo-like fashion. In other words, this superconducting state, which exists in fields above 73 teslas, is stabilized by a field component perpendicular to the magnetic easy axis. These remarkable field scales further underscore UTe$_2$'s unique magnetophilic superconducting tendencies and suggest an underlying pairing mechanism that is qualitatively distinct from known theories for field-enhanced superconductivity. Phenomenological modeling points to a two-component, non-unitary spin triplet order parameter with finite orbital momentum of the Cooper pairs as a natural explanation for the field-angle dependence of the upper critical field of the SC$_{\rm{FP}}$ phase. Comment: 7 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.18564 |
| رقم الأكسشن: | edsarx.2402.18564 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |