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http://elar.urfu.ru/handle/10995/102754
Title: | Anisotropic Superconducting Gaps and Boson Mode in FeSe 1−x Sx Single Crystals |
Authors: | Giorgio, C. D. Putilov, A. V. Trainer, D. J. Volkova, O. S. Vasiliev, A. N. Chareev, D. Karapetrov, G. Zasadzinski, J. F. Iavarone, M. |
Issue Date: | 2017 |
Publisher: | Springer New York LLC |
Citation: | Anisotropic Superconducting Gaps and Boson Mode in FeSe 1−x Sx Single Crystals / C. D. Giorgio, A. V. Putilov, D. J. Trainer, et al. — DOI 10.1007/s10948-016-3644-6 // Journal of Superconductivity and Novel Magnetism. — 2017. — Vol. 30. — Iss. 3. — P. 763-768. |
Abstract: | Scanning tunneling spectroscopy has been used to investigate the superconducting gaps of FeSe 1−xSx 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 Ω/e, measured with respect to the superconducting gap. The energy of the boson mode Ω is found to scale with the superconducting gap, and it can be estimated to be in the range 2.6 ÷ 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. © 2016, Springer Science+Business Media New York. |
Keywords: | ELECTRONIC STRUCTURE SCANNING TUNNELING MICROSCOPY SUPERCONDUCTING MATERIALS-CHALCOGENIDES TUNNELING ANISOTROPY BOSONS ELECTRON SPIN RESONANCE SPECTROSCOPY ELECTRON TUNNELING ELECTRONIC STRUCTURE INORGANIC COMPOUNDS NEUTRON SCATTERING ORGANIC SUPERCONDUCTING MATERIALS SCANNING TUNNELING MICROSCOPY SUPERCONDUCTING MATERIALS BOSONIC MODES QUASI PARTICLES QUASIPARTICLE DENSITY SCANNING TUNNELING SPECTROSCOPY SPIN EXCITATION SUPERCONDUCTING GAPS SINGLE CRYSTALS |
URI: | http://elar.urfu.ru/handle/10995/102754 |
Access: | info:eu-repo/semantics/openAccess |
SCOPUS ID: | 84982267393 |
WOS ID: | 000395062600028 |
PURE ID: | 3fb9bb22-22d4-40fc-a8ad-3ebf431bd295 1619889 |
ISSN: | 15571939 |
DOI: | 10.1007/s10948-016-3644-6 |
Appears in Collections: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
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