تقرير
Dipole-Obstructed Cooper Pairing: Theory and Application to $j=3/2$ Superconductors
| العنوان: | Dipole-Obstructed Cooper Pairing: Theory and Application to $j=3/2$ Superconductors |
|---|---|
| المؤلفون: | Zhu, Penghao, Zhang, Rui-Xing |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Like electrons, Cooper pairs can carry a monopole charge if the pairing electrons come from two or more Fermi surfaces with different Chern numbers. In such an instance, a superconductor is necessarily nodal due to an inherent topological pairing obstruction. In this work, we show that a similar obstruction is also possible when there is only one Fermi surface involved in the pairing process. By developing a Chern-vorticity theorem, we have identified a class of Fermi surfaces with a quantized dipolar Berry flux pattern, where all intra-Fermi-surface Cooper pairings are ``dipole-obstructed" and nodal. As a real-world application, we find that the dipole obstruction plays a crucial role in stabilizing the superconducting nodal structure for $j=3/2$ half-Heusler compounds. Comment: 6+9 pages, 3+5 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.00091 |
| رقم الأكسشن: | edsarx.2405.00091 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |