Density of States Driven Anisotropies Induced by Momentum Decoupling in High-Tc Superconductors

Abstract

Momentum decoupling arises when small momentum transfer processes dominate the electron-phonon scattering and implies that anisotropies in superconductivity are driven by the anisotropies of the density of states. Considering an isotropic s-wave interaction in the momentum decoupling regime we give a natural simultaneous explanation to various aspects of ARPES and tunnel experiments on $B{i}_{2}S{r}_{2}CaC{u}_2{O}_8$, including the correlation of gap magnitude and visibility of the dip above the gap, the enhancement of anisotropy with temperature, the presence of gap minima away from the $\Gamma -X$ direction and a gap maximum in the $\Gamma -X$ direction, the similarity of tunnel and ARPES spectra in the $\Gamma -\bar{M}$ direction and the asymmetry in the SIN tunnel spectra where the dip structure is present only at negative sample bias.

4 pages, latex (revtex), 4 figures and simple latex version available upon request to [email protected]

References in corpus (3)

• Phenomenological Models for the Gap Anisotropy of Bi-2212 as Measured by ARPES
• Comment on ``Quasiparticle Decay Effects in the Superconducting Density of States: Evidence for d-Wave Pairing in the Cuprates''
• The boson mediators of high-Tc superconductivity: phonons versus composite bosons from the superconducting phenomenology

Cited by in corpus (22)

• Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3
• d-wave superconductivity near charge instabilities
• Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates
• Density-induced BCS to Bose-Einstein crossover
• Bridging k- and q- Space in the Cuprates: Comparing ARPES and STM Results
• Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and high-T${}_c$ superconductivity in FeSe/SrTiO${}_3$
• Aspects of electron-phonon interactions with strong forward scattering in FeSe Thin Films on SrTiO${}_3$ substrates
• Small-q phonon-mediated superconductivity in organic κ-BEDT-TTF compounds
• Novel pairing mechanism for superconductivity at a vanishing level of doping driven by critical ferroelectric modes
• Small-q Phonon Mediated Unconventional Superconductivity in the Iron Pnictides
• Nonadiabatic pairing effects for tight-binding electrons interacting with phonons
• Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on SrTiO${}_3$
• Efficient Selfconsistent Calculations of Multiband Superconductivity in UPd${}_2$Al${}_3$
• Orthorhombicity mixing of s- and d- gap components in $YB{a}_{2}C{u}_3{O}_7$ without involving the chains
• Fermi Surface and gap parameter in high-Tc superconductors: the Stripe Quantum Critical Point scenario
• Small-q electron-phonon scattering and linear dc resistivity in high-T_c oxides
• Stable pair liquid phase in fermionic systems
• Charge correlations suppress unconventional pairing in the Holstein model
• Charge-Density-Wave State in Extremely Overdoped Cuprates Driven by Phonons
• Understanding and enhancing superconductivity in FeSe/STO by quantum size effects
• Topological asymmetry in the damping-pairing contribution of electron-boson scattering
• Non-thermal pairing glue of electrons in the steady state