Correlation of Fe-Based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure
SCIE
SCOPUS
- Title
- Correlation of Fe-Based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure
- Authors
- Choi, Seokhwan; Johnston, Steven; Jang, Won-Jun; Koepernik, Klaus; Nakatsukasa, Ken; Ok, Jong Mok; Lee, Hyun-Jung; Choi, Hyun Woo; Lee, Alex Taekyung; Akbari, Alireza; Semertzidis, Yannis K.; Bang, Yunkyu; Kim, Jun Sung; Lee, Jhinhwan
- Date Issued
- 2017-09
- Publisher
- AMER PHYSICAL SOC
- Abstract
- Interfacial phonons between iron-based superconductors (FeSCs) and perovskite substrates have received considerable attention due to the possibility of enhancing preexisting superconductivity. Using scanning tunneling spectroscopy, we studied the correlation between superconductivity and e-ph interaction with interfacial phonons in an iron-based superconductor Sr2VO3FeAs (T-c approximate to 33 K) made of alternating FeSC and oxide layers. The quasiparticle interference measurement over regions with systematically different average superconducting gaps due to the e-ph coupling locally modulated by O vacancies in the VO2 layer, and supporting self-consistent momentum-dependent Eliashberg calculations provide a unique real-space evidence of the forward-scattering interfacial phonon contribution to the total superconducting pairing.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92021
- DOI
- 10.1103/PhysRevLett.119.107003
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 119, no. 10, 2017-09
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- There are no files associated with this item.
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