Electron-Phonon Coupling in High-Temperature Cuprate Superconductors Determined from Electron Relaxation Rates
Christoph Gadermaier,A. S. Alexandrov,A. S. Alexandrov,Viktor V. Kabanov,P. Kusar,Tomaz Mertelj,Xin Yao,Cristian Manzoni,Daniele Brida,Giulio Cerullo,Dragan Mihailovic +10 more
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Electronic relaxation times via pump-probe optical spectroscopy using sub-15 fs pulses for the normal state of two different cuprate superconductors suggest a possible fundamental role of the electron-phonon interaction in the superconducting pairing mechanism.Abstract:
We determined electronic relaxation times via pump-probe optical spectroscopy using sub-15 fs pulses for the normal state of two different cuprate superconductors. We show that the primary relaxation process is the electron-phonon interaction and extract a measure of its strength, the second moment of the Eliashberg function λ[ω2] = 800 ± 200 meV2 for La(1.85)Sr(0.15)CuO4 and λ[ω2] = 400 ± 100 meV2 for YBa(2)Cu(3)O(6.5). These values suggest a possible fundamental role of the electron-phonon interaction in the superconducting pairing mechanism.read more
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Froehlich Polaron and Bipolaron: Recent Developments
Jozef Devreese,Sasha Alexandrov +1 more
TL;DR: The field of continuum and discrete Froehlich polaron (bi)polarons has been a testing ground for analytical, semi-analytical, and numerical techniques, such as path integrals, strong-coupling perturbation expansion, advanced variational, exact diagonalisation (ED), and quantum Monte Carlo (QMC) techniques as mentioned in this paper.
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Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
Claudio Giannetti,Massimo Capone,Daniele Fausti,Michele Fabrizio,Fulvio Parmigiani,Dragan Mihailovic +5 more
TL;DR: In the last two decades non-equilibrium spectroscopies have evolved from avant-garde studies to crucial tools for expanding our understanding of the physics of strongly correlated materials as mentioned in this paper.
Journal ArticleDOI
Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
Claudio Giannetti,Massimo Capone,Daniele Fausti,Michele Fabrizio,Fulvio Parmigiani,Dragan Mihailovic +5 more
TL;DR: In this article, a review of the most recent achievements in the experimental and theoretical studies of the non-equilibrium electronic, optical, structural and magnetic properties of correlated materials is presented.
Journal ArticleDOI
Disentangling the Electronic and Phononic Glue in a High-Tc Superconductor
S. Dal Conte,Claudio Giannetti,Giacomo Coslovich,Federico Cilento,D. Bossini,T. Abebaw,Francesco Banfi,Gabriele Ferrini,Hiroshi Eisaki,Martin Greven,Andrea Damascelli,D. van der Marel,Fulvio Parmigiani +12 more
TL;DR: Time-resolved optical spectroscopy of an optimally doped cuprate is used to show that the temporal evolution of the reflectivity is consistent with the electronic contribution being dominant and is able to account for the high Tc by itself.
Journal ArticleDOI
Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates
S. Dal Conte,Lev Vidmar,Lev Vidmar,Denis Golež,Marcin Mierzejewski,Giancarlo Soavi,Simone Peli,Simone Peli,Francesco Banfi,Gabriele Ferrini,Riccardo Comin,B. Ludbrook,L. Chauviere,L. Chauviere,Nikolai D. Zhigadlo,Hiroshi Eisaki,Martin Greven,Stefano Lupi,Andrea Damascelli,Daniele Brida,Daniele Brida,Massimo Capone,Janez Bonča,Janez Bonča,Giulio Cerullo,Claudio Giannetti +25 more
TL;DR: By pushing both time and frequency resolution in optical spectroscopy, it is now possible to resolve antiferromagnetic fluctuations in a copper oxide superconductor, which are believed to mediate the pairing of charge carriers.
References
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Polarons in advanced materials
TL;DR: In this paper, Alexandrov et al. discuss the early days of Polaron theory and their approach to the Holstein Polaron Problem in the context of magnetoresistive and high-temperature superconducting materials.