Anomalies of the infrared-active phonons in underdoped YBCO as an evidence for the intra-bilayer Josephson effect

Abstract

The spectra of the far-infrared c-axis conductivity of underdoped YBCO crystals exhibit dramatic changes of some of the phonon peaks when going from the normal to the superconducting state. We show that the most striking of these anomalies can be naturally explained by changes of the local fields acting on the ions arising from the onset of inter- and intra-bilayer Josephson effects.

arXiv commentRevtex, epsf, 6 pages, 3 figures encapsulated in text

References in corpus (4)

• Transverse optical plasmons in layered superconductors
• Frustrated kinetic energy, the optical sum rule, and the mechanism of superconductivity
• a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T*
• Pairing and Phase Coherence in High Temperature Superconductors

Cited by in corpus (37)

• The doping dependence of T* - what is the real high-Tc phase diagram?
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling
• Optical characterization of Bi${}_2$Se${}_3$ in a magnetic field: infrared evidence for magnetoelectric coupling in a topological insulator material
• Evidence of precursor superconductivity as high as 180 K from infrared spectroscopy
• Femtosecond Quasiparticle and Phonon Dynamics in Superconducting YBa2Cu3O7 Studied by Wideband Terahertz Spectroscopy
• Dynamical charge density waves rule the phase diagram of cuprates
• Observation of out-of-phase bilayer plasmons in YBa_2Cu_3O_7-delta
• Spectroscopic distinction between the normal state pseudogap and the superconducting gap of cuprate high T_{c} superconductors
• Sum rules and energy scales in the high-temperature superconductor YBa2Cu3O6+x
• C-axis lattice dynamics in Bi-based cuprate superconductors
• Transverse optical Josephson plasmons, equations of motion
• The anomaly of the oxygen bond-bending mode at 320 cm${}^{-1}$ and the additional absorption peak in the c-axis infrared conductivity of underdoped YBa${}_2$Cu${}_3$O${}_{7-\delta }$ single crystals revisited by ellipsometricmeasurements
• Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors
• Observation of the Transverse Optical Plasmon in SmLa0.8Sr0.2CuO4-d
• Josephson plasma resonance and phonon anomalies in trilayer Bi_2Sr_2Ca_2Cu_3O_10 superconductor
• Correlation between the Josephson coupling energy and the condensation energy in bilayer cuprate superconductors
• Cavity magnon-polaritons in cuprate parent compounds
• The Mysterious Pseudogap in High Temperature Superconductivity, an Infrared View
• New Josephson Plasma Modes in Underdoped YBa2Cu3O6.6 Induced by Parallel Magnetic Field
• The c-axis optical sum rule and possible new collective mode in LSCO
• Phonon anomalies and electron-phonon interaction in RuSr_2GdCu_2O_8 ferromagnetic superconductor: Evidence from infrared conductivity
• Parametrically amplified phase-incoherent superconductivity in YBa${}_2$Cu${}_3$O${}_{6+x}$
• The role of magnetism in forming the c-axis spectral peak at 400 cm-1 in high-temperature superconductors
• Observation of polaritons in Bi2Sr2CaCu2O8+x single crystals
• Far-infrared c-axis conductivity of flux-grown Y${}_{1-x}$Pr${}_x$Ba${}_2$Cu${}_3$O${}_7$ single crystals studied by spectral ellipsometry
• Approximate tight-binding sum rule for the superconductivity related change of c-axis kinetic energy in multilayer cuprate superconductors
• Microscopic gauge-invariant theory of the c-axis infrared response of bilayer cuprate superconductors and the origin of the superconductivity induced absorption bands
• Phonon anomalies in trilayer high-Tc superconductors
• Clocking the Onset of Bilayer Coherence in a High-${\mathrm{T}}_{\mathrm{C}}$ Cuprate
• Squeezed Josephson plasmons in driven YBa${}_2$Cu${}_3$O${}_{6+x}$
• Magnetic Field Dependence of the Transverse Plasmon in SmLa_0.8Sr_0.2CuO_4
• Investigating Josephson plasmons in layered cuprates via nonlinear terahertz spectroscopy
• Optical melting of the transverse Josephson plasmon: a comparison between bilayer and trilayer cuprates
• Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$-axis response of the bilayer compound RbCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Quantum mechanical picture of the coupling between interlayer electronic excitations and infrared active phonons in bilayer cuprate superconductors
• Enhanced coherent terahertz emission from critical superconducting fluctuations in YBa${}_2$Cu${}_3$O${}_{6.6}$