تقرير
Superconducting properties and gap structure of the topological superconductor candidate Ti_(3)Sb
| العنوان: | Superconducting properties and gap structure of the topological superconductor candidate Ti_(3)Sb |
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| المؤلفون: | Chapai, R., Smylie, M. P., Hebbeker, H., Chung, D. Y., Kwok, W. -K., Mitchell, J. F., Welp, U. |
| المصدر: | Phys. Rev. B 107, 104504 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | We present a study of the superconducting properties of the candidate topological superconductor Ti_(3)Sb. Electrical transport measurements show zero resistance with a T_(c,onset) of ~ 5.9 K with a transition width {\Delta}T_c~ 0.6 K. The superconducting phase boundaries as derived from magneto-transport and magnetic susceptibility measurements agree well. We estimate an upper critical field Bc2(0)~4.5 T. A Ginzburg-Landau (GL) analysis yields values of the coherence length and penetration depth of {\zeta} = 6.2 nm and {\lambda} = 340 nm, respectively, and a GL parameter ~ 55, indicating extreme type-II behavior. Furthermore, we observed a step height in the specific heat ({\Delta}C_e)/({\gamma}T_c )~1.61, a value larger than the Bardeen-Cooper-Schrieffer (BCS) value of 1.43, suggesting modest coupling. Measurements of the temperature dependence of the London penetration depth via the tunnel-diode oscillator (TDO) technique down to ~ 450 mK show a full superconducting gap, consistent with a conventional s-wave gap structure. Comment: 19 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.104504 |
| URL الوصول: | http://arxiv.org/abs/2211.00124 |
| رقم الأكسشن: | edsarx.2211.00124 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.107.104504 |
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