تقرير
Surface superconductivity in a three-dimensional Cd$_3$As$_2$ semimetal
| العنوان: | Surface superconductivity in a three-dimensional Cd$_3$As$_2$ semimetal |
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| المؤلفون: | Shvetsov, O. O., Esin, V. D., Timonina, A. V., Kolesnikov, N. N., Deviatov, E. V. |
| المصدر: | Phys. Rev. B 99, 125305 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Superconductivity |
| الوصف: | We experimentally investigate charge transport through a single planar junction between Cd$_3$As$_2$ Dirac semimetal and a normal Au lead. For non-superconducting bulk Cd$_3$As$_2$ samples, we observe non-Ohmic $dV/dI(V)$ curves, which strongly resemble standard Andreev reflection with well-defined superconducting gap. Andreev-like behavior is demonstrated for Cd$_3$As$_2$ samples with different surface and contact preparation techniques. We connect this behavior with surface superconductivity due to the flat-band formation in Cd$_3$As$_2$, which has been predicted theoretically. The conclusion on superconductivity is also supported by the gap suppression by magnetic fields or temperature. Comment: final version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.125305 |
| URL الوصول: | http://arxiv.org/abs/1811.02475 |
| رقم الأكسشن: | edsarx.1811.02475 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.99.125305 |
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