Strong electron-Boson coupling effect in the infrared spectra of $T{l}_{2}B{a}_{2}CaC{u}_2{O}_{8+\delta }$

Abstract

We report on a study of the in-plane infrared response of a \TBCCO film with $T_c$=108 K. The fingerprint evidence for a strong electron-Boson coupling has been observed. The raw reflectance below T${}_c$ exhibits a knee structure at around 650 \cm and the ratio of the reflectances below and above T${}_c$ displays a pronounced minimum at around 1000 \cm. In particular, the features appear at higher energy scale than other bilayer cuprates with T${}_c$ around 90-95 K. The gap amplitude and the Boson mode energy were extracted from the analysis of the bosonic spectral function. In comparison with several other optimally doped high-Tc cuprates, we find that the gap size scales with T${}_c$, but Boson mode energy has a tendency to decrease.

to be published in Phys. Rev. B

References in corpus (15)

• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Renormalization of spectral lineshape and dispersion below Tc in Bi2Sr2CaCu2O8+d
• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
• Electronic excitations in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ : Fermi surface, dispersion, and absence of bilayer splitting
• Bosonic Mode Mixing in the Superconducting State Spectral Function of Bi_2Sr_2CaCu_2O_{8+delta}
• Magnetic Resonant Mode in the Single-Layer High Temperature Superconductor Tl${}_2$Ba${}_2$Cu${}_{6+\delta }$
• Coupling strength of charge carriers to spin fluctuations in high-temperature superconductors
• Correlation of Tunneling Spectra in Bi2Sr2CaCu2O(8+delta) with the Resonance Spin Excitation
• Electronic structure of the trilayer cuprate superconductor Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• Inversion of K${}_3$C${}_{60}$ Reflectance Data
• Temperature Evolution of the Pseudogap State in the Infra-Red Response of Underdoped La_(2-x)Sr_xCuO_4
• In-plane polarized collective modes in detwinned YBa${}_2$Cu${}_3$O${}_{6.95}$ observed by spectral ellipsometry
• Singularities in the optical response of cuprates
• Scattering Rate Gap in the IR Response of HgBa_2Ca_2Cu_3O_{8+delta}
• The oxygen isotope effect in the ab-plane reflectance of underdoped YBa_2Cu_3O_{7-delta}

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• Electrodynamics of correlated electron matter
• Electron-boson mode coupling and the pseudogap of Na${}_x$CoO${}_2$ by infrared spectroscopy
• Infrared scattering rate of overdoped Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$
• Crystal growth and in-plane optical properties of Tl${}_2$Ba${}_2$Ca${}_{n-1}$Cu${}_n$O${}_x$ (n=1,2,3) superconductors
• Interpretation of the in-plane infrared response of the high-Tc cuprate superconductors involving spin fluctuations revisited
• In-plane optical spectra of Y${}_{1-x}$Ca${}_x$Ba${}_2$Cu${}_3$O${}_{7-\delta }$: Overdoping and disorder effect on residual conductivity
• Charge dynamics in the phase string model for high-Tc superconductors
• Measurements of microwave vortex response in dc magnetic fields in Tl${}_2$Ba${}_2$CaCu${}_2$O${}_{8+x}$ films
• Universal phonon softening in the pseudogap state of Tl${}_2$Ba${}_2$Ca${}_{n-1}$Cu${}_n$O${}_{2n+4+\delta }$