Please use this identifier to cite or link to this item: http://hdl.handle.net/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://hdl.handle.net/10995/102754
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84982267393
PURE ID: 1619889
3fb9bb22-22d4-40fc-a8ad-3ebf431bd295
ISSN: 15571939
DOI: 10.1007/s10948-016-3644-6
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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