تقرير
Bosonic topological insulator intermediate state in the superconductor-insulator transition
| العنوان: | Bosonic topological insulator intermediate state in the superconductor-insulator transition |
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| المؤلفون: | Diamantini, M. C., Mironov, A. Yu., Postolova, S. V., Liu, X., Hao, Z., Silevitch, D. M., Kopelevich, Ya., Kim, P., Trugenberger, C. A., Vinokur, V. M. |
| المصدر: | Phys. Lett. A 384 (2020) 126570 |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | A low-temperature intervening metallic regime arising in the two-dimensional superconductor-insulator transition challenges our understanding of electronic fluids. Here we develop a gauge theory revealing that this emergent anomalous metal is a bosonic topological insulator where bulk transport is suppressed by mutual statistics interactions between out-of-condensate Cooper pairs and vortices and the longitudinal conductivity is mediated by symmetry-protected gapless edge modes. We explore the magnetic-field-driven superconductor-insulator transition in a niobium titanium nitride device and find marked signatures of a bosonic topological insulator behavior of the intervening regime with the saturating resistance. The observed superconductor-anomalous metal and insulator-anomalous metal dual phase transitions exhibit quantum Berezinskii-Kosterlitz-Thouless criticality in accord with the gauge theory. Comment: 10 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physleta.2020.126570 |
| URL الوصول: | http://arxiv.org/abs/1906.07969 |
| رقم الأكسشن: | edsarx.1906.07969 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physleta.2020.126570 |
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