Excitation of a bosonic mode by electron tunneling into a cuprate superconductor

Abstract

We performed scanning tunneling spectroscopic experiments on hole-doped NdBa${}_2$Cu${}_3$O${}_{7-\delta }$. The d$I$/d$V$ curves obtained at 4.2 K are asymmetric with clear peak-dip and hump structures. Energy derivatives of these curves show peaks at energies beyond the dip features. Highly precise full potential bandstructure calculations confirm a featureless electronic density of states in that energy region. Our results indicate that tunneling electrons couple to a collective mode in the CuO${}_2$ plane.

arXiv comment5 pages, 4 figures

References in corpus (22)

• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Imaging the Effects of Individual Zinc Impurity Atoms on Superconductivity in Bi2Sr2CaCu2O8+delta
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Neutron Scattering from Magnetic Excitations in Bi_2 Sr_2 Ca_2 O_8+delta
• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
• Evolution of the resonance and incommensurate spin fluctuations in superconducting YBa${}_2$Cu${}_3$O${}_{6+x}$
• Coupling Of The B1g Phonon To The Anti-Nodal Electronic States of Bi2Sr2Ca0.92Y0.08Cu2O(8+delta)
• Density Functional Application to Strongly Correlated Electron Systems
• Superconducting Gap and Strong In-Plane Anisotropy in Untwinned YBa2Cu3O7-d
• Origin of the peak-dip-hump structure in the photoemission spectra of Bi2212
• Doping dependence of the mass enhancement in (Pb,Bi)_2 Sr_2 Ca Cu_2 O_8 at the antinodal point in the superconducting and normal state
• Doping dependence of the coupling of electrons to bosonic modes in the single-layer high-temperature Bi2Sr2CuO6 superconductor
• Theory of Asymmetric Tunneling in the cuprate superconductors
• A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
• Role of Inelastic Tunneling through the Barrier in Scanning Tunneling Microscope Experiments on Cuprates
• Parity of the Pairing Bosons in a High-Temperature Superconductor
• Constraints on the Quasiparticle Density of States in High-$T_c$ Superconductors
• Proximity Effects and Quantum Dissipation in the Chains of YBa${}_2$Cu${}_3$O$_{6+x}
• Fourier-Transformed Local Density of States and Tunneling into a $D$-Wave Superconductor with Bosonic Modes
• Inelastic Tunneling Spectroscopy in a D-wave Superconductor
• Tunneling Spectroscopy on c-axis Y{1-x}Ca{x}Ba2Cu3O{7-delta} Thin Films

Cited by in corpus (3)

• Bosons in high temperature superconductors: an experimental survey
• Theory of (001) surface and bulk states in Y${}_{1-y}$Ca${}_y$Ba${}_2$Cu${}_3$O${}_{7-\delta }$}
• Effect of spin excitations on the property of quasiparticles in electron-doped cuprates