Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2Cu3O10+δ

Berthod, Christophe; Fasano, Yanina; Maggio-Aprile, Ivan; Piriou, Alexandre; Giannini, Enrico; Levy de Castro, G.; Fischer, Oystein

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Title		Strong-coupling analysis of scanning tunneling spectra in Bi₂Sr₂Ca₂Cu₃O_10+δ
Authors		Berthod, Christophe Fasano, Yanina Maggio-Aprile, Ivan Piriou, Alexandre Giannini, Enrico Levy de Castro, G. Fischer, Oystein
Published in		Physical Review. B, Condensed Matter. 2013, vol. 88, no. 014528
Abstract		We study a series of spectra measured in the superconducting state of optimally-doped Bi-2223 by scanning tunneling spectroscopy. Each spectrum, as well as the average of spectra presenting the same gap, is fitted using a strong-coupling model taking into account the band structure, the BCS gap, and the interaction of electrons with the spin resonance. After describing our measurements and the main characteristics of the strong-coupling model, we report the whole set of parameters determined from the fits, and we discuss trends as a function of the gap magnitude. We also simulate angle-resolved photoemission spectra, and compare with recent experimental results.
Identifiers		DOI: 10.1103/PhysRevB.88.014528 arXiv: 1303.2450
Full text		Article (Published version) (2.1 MB) - Free access Other version: http://link.aps.org/doi/10.1103/PhysRevB.88.014528
Structures		Faculté des sciences / Section de physique / Département de physique de la matière quantique
Citation (ISO format)		BERTHOD, Christophe et al. Strong-coupling analysis of scanning tunneling spectra in Bi₂Sr₂Ca₂Cu₃O_10+δ. In: Physical Review. B, Condensed Matter, 2013, vol. 88, n° 014528. https://archive-ouverte.unige.ch/unige:29036