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Journal article
Anisotropic Superconducting Gaps and Boson Mode in FeSe (1-x) S (x) Single Crystals
Journal of superconductivity and novel magnetism, v 30(3), pp 763-768
01 Mar 2017
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Abstract
Scanning tunneling spectroscopy has been used to investigate the superconducting gaps of FeSe (1-x) S (x) single crystals and to reveal signatures of a bosonic mode in the quasiparticle density of states. We find that both superconducting gaps residing on different pockets of the Fermi surface are anisotropic. Moreover, the bosonic mode appears in the quasiparticle density of states as a redistribution of states at energy Omega/e, measured with respect to the superconducting gap. The energy of the boson mode Omega is found to scale with the superconducting gap, and it can be estimated to be in the range 2.6 A center dot 3.8 meV in agreement with a recent observation of a resonance spin excitation in neutron scattering. This suggests that quasiparticle interactions with this mode are important for superconductivity.
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2 citations in Scopus
Details
- Title
- Anisotropic Superconducting Gaps and Boson Mode in FeSe (1-x) S (x) Single Crystals
- Creators
- C. Di Giorgio - Temple UniversityA. V. Putilov - Temple UniversityD. J. Trainer - Temple UniversityO. S. Volkova - Ural Federal UniversityA. N. Vasiliev - Ural Federal UniversityD. Chareev - Institute of Experimental MineralogyG. Karapetrov - Drexel UniversityJ. F. Zasadzinski - Illinois Institute of TechnologyM. Iavarone - Temple University
- Publication Details
- Journal of superconductivity and novel magnetism, v 30(3), pp 763-768
- Publisher
- Springer Nature
- Number of pages
- 6
- Grant note
- FSAX-14-60108-0; OISE-14-60109-0 / US Civilian Research and Development Foundation (CRDF) MIUR (Ministry of Education, Universities and Research of the Italian Government); Ministry of Education, Universities and Research (MIUR) K4-2015-020 / Ministry of Education and Science of the Russian Federation; Ministry of Education and Science, Russian Federation DE-SC0004556 / US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000395062600028
- Scopus ID
- 2-s2.0-84982267393
- Other Identifier
- 991019168500604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied
- Physics, Condensed Matter