| Autor: |
Yin, J. -X., Wu, X. -X., Li, Jian, Wu, Zheng, Wang, J. -H., Ting, C. -S., Hor, P. -H., Liang, X. J., Zhang, C. L., Dai, P. C., Wang, X. C., Jin, C. Q., Chen, G. F., Hu, J. P., Wang, Z. -Q., Li, Ang, Ding, H., Pan, S. H. |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 102, 054515 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.102.054515 |
| Popis: |
We use scanning tunneling microscopy/spectroscopy (STM/S) to elucidate the Cooper pairing of the iron pnictide superconductor Ba0.6K0.4Fe2As2. By a cold-cleaving technique, we obtain atomically resolved termination surfaces with different layer identities. Remarkably, we observe that the low-energy tunneling spectrum related to superconductivity has an unprecedented dependence on the layer-identity. By cross-referencing with the angle-revolved photoemission results and the tunneling data of LiFeAs, we find that tunneling on each termination surface probes superconductivity through selecting distinct Fe-3d orbitals. These findings imply the real-space orbital features of the Cooper pairing in the iron pnictide superconductors, and propose a new and general concept that, for complex multi-orbital material, tunneling on different terminating layers can feature orbital selectivity. |
| Databáze: |
arXiv |
| Externí odkaz: |
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