| Autor: |
Zareapour, Parisa, Hayat, Alex, Zhao, Shu Yang F., Kreshchuk, Michael, Xu, Zhijun, Liu, T. S., Gu, G. D., Jia, Shuang, Cava, Robert J., Yang, H. -Y., Ran, Ying, Burch, Kenneth S. |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
New J. Phys. 19 (2017) 043026 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/1367-2630/aa6b8a |
| Popis: |
We address the controversy over the proximity effect between topological materials and high T$_{c}$ superconductors. Junctions are produced between Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ and materials with different Fermi surfaces (Bi$_{2}$Te$_{3}$ \& graphite). Both cases reveal tunneling spectra consistent with Andreev reflection. This is confirmed by magnetic field that shifts features via the Doppler effect. This is modeled with a single parameter that accounts for tunneling into a screening supercurrent. Thus the tunneling involves Cooper pairs crossing the heterostructure, showing the Fermi surface mis-match does not hinder the ability to form transparent interfaces, which is accounted for by the extended Brillouin zone and different lattice symmetries. |
| Databáze: |
arXiv |
| Externí odkaz: |
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