Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2
Abstract
Here, we use scanning tunneling microscopy/spectroscopy 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-3$$\textit{d}$$ orbitals. These findings imply the real-space orbital features of the Cooper pairing in the iron pnictide superconductors, and propose a general concept that, for complex multiorbital material, tunneling on different terminating layers can feature orbital selectivity.
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China). Institute of Physics
- Univ. of Houston, TX (United States)
- Rice Univ., Houston, TX (United States)
- Chinese Academy of Sciences (CAS), Beijing (China). Institute of Physics; University of Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China). Institute of Physics; Purdue Univ., West Lafayette, IN (United States)
- Boston College, Chestnut Hill, MA (United States)
- Univ. of Houston, TX (United States); Chinese Academy of Sciences (CAS), Shanghai (China). State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology; CAS Center for Excellence in Superconducting Electronics, Shanghai (China)
- Chinese Academy of Sciences (CAS), Beijing (China). Institute of Physics; Univ. of Houston, TX (United States); University of Chinese Academy of Sciences (CAS), Beijing (China); Songshang Lake Material Laboratory, Guangdong (China)
- Publication Date:
- Research Org.:
- Boston College, Chestnut Hill, MA (United States)
- Sponsoring Org.:
- Chinese Academy of Sciences (CAS); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of the People’s Republic of China (MOST); Shanghai Science and Technology Committee; State of Texas; Robert A. Welch Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1800972
- Grant/Contract Number:
- FG02-99ER45747; 11227903; Z181100004218007; 2015CB921300; 2015CB921304; 2017YFA0302903; XDB04040300; XDB07000000; 18ZR1447300; E-1146; DMR-1700081
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 102; Journal Issue: 5; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials Science; Physics
Citation Formats
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., and Pan, S. H. Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2. United States: N. p., 2020.
Web. doi:10.1103/physrevb.102.054515.
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. Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2. United States. https://doi.org/10.1103/physrevb.102.054515
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., and Pan, S. H. Fri .
"Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2". United States. https://doi.org/10.1103/physrevb.102.054515. https://www.osti.gov/servlets/purl/1800972.
@article{osti_1800972,
title = {Orbital selectivity of layer-resolved tunneling in the iron-based superconductor Ba0.6K0.4Fe2As2},
author = {Yin, J.-X. and Wu, X.-X. and Li, Jian and Wu, Zheng and Wang, J.-H. and Ting, C.-S. and Hor, P.-H. and Liang, X. J. and Zhang, C. L. and Dai, P. C. and Wang, X. C. and Jin, C. Q. and Chen, G. F. and Hu, J. P. and Wang, Z.-Q. and Li, Ang and Ding, H. and Pan, S. H.},
abstractNote = {Here, we use scanning tunneling microscopy/spectroscopy 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-3$\textit{d}$ orbitals. These findings imply the real-space orbital features of the Cooper pairing in the iron pnictide superconductors, and propose a general concept that, for complex multiorbital material, tunneling on different terminating layers can feature orbital selectivity.},
doi = {10.1103/physrevb.102.054515},
journal = {Physical Review B},
number = 5,
volume = 102,
place = {United States},
year = {Fri Aug 21 00:00:00 EDT 2020},
month = {Fri Aug 21 00:00:00 EDT 2020}
}
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