Report
Model evidence of a superconducting state with a full energy gap in small cuprate islands
| العنوان: | Model evidence of a superconducting state with a full energy gap in small cuprate islands |
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| المؤلفون: | Black-Schaffer, Annica M., Golubev, Dmitri S., Bauch, Thilo, Lombardi, Floriana, Fogelström, Mikael |
| المصدر: | Phys. Rev. Lett. 110, 197001 (2013) |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | We investigate subdominant order parameters stabilizing at low temperatures in nano-scale high-T$_c$ cuprate islands, motivated by the recent observation of a fully gapped state in nanosized YBa$_2$Cu$_3$O$_{7-\delta}$ [D. Gustafsson {\it et al}, Nature Nanotech. {\bf 8}, 25 (2013)]. Using complementary quasi-classical and tight-binding Bogoliubov-de Gennes methods, we show on distinctly different properties dependent on the symmetry being $d_{x^2-y^2}+i s$ or $d_{x^2-y^2}+i d_{xy}$. We find that a surface-induced $d_{x^2-y^2}+i s$ phase creates a global spectroscopic gap which increases with applied magnetic field, consistent with experimental observation. Comment: 5 pages, three figures, accepted for publication in Physical Review Letters |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.110.197001 |
| URL الوصول: | http://arxiv.org/abs/1304.4054 |
| رقم الانضمام: | edsarx.1304.4054 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.110.197001 |
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