Bosonic mode interpretation of novel STM and related experimental results, within boson-fermion modelling of HTSC Materials

Abstract

This paper seeks to synthesize much recent work on the HTSC materials around the latest energy resolved scanning tunnelling microscopy (STM) results from Davis and coworkers. The STM conductance diffuse scattering results in particular are employed as point of entry to discuss bosonic modes, both of condensed and uncondensed form. The bosonic mode picture is essential to understanding an ever growing range of observations within the HTSC field. The work is expounded within the context of the site-inhomogeneous negative-U boson-fermion modelling long advocated by the author. This general approach is presently seeing much theoretical development, into which I have looked to couple many of the experimental advances. While this formal theory is not yet sufficiently detailed to cover adequately all the experimental complexities presented by the real cuprate systems, it is clear it affords very appreciable support to the line taken. An attempt is made throughout to clarify why and how it is that these novel circumstances and phenomena are tied so very closely to this particular set of materials.

arXiv commentSubmitted to Phil. Mag

References in corpus (22)

• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• What angle-resolved photemission experiments tell about the microscopic theory for high-temperature superconductors
• 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
• Effect of the magnetic resonance on the electronic spectra of high Tc superconductors
• What the resonance peak does
• The neutron resonance in the cuprates and its effect on fermionic excitations
• Superconducting gap in the presence of bilayer splitting in underdoped Bi(Pb)2212
• Magnetic Order in YBa${}_2$Cu${}_3$O${}_{6+x}$ Superconductors
• Absence of gross inhomogeneity in HTS cuprates
• Upward curvature of the upper critical field in the Boson--Fermion model
• Quasiparticles in high temperature superconductors: consistency of angle resolved photoemission and optical conductivity
• From local to macroscopic coherence in systems with composite quasi-particles
• Feshbach resonance described by the boson fermion coupling
• From phase- to amplitude-fluctuation driven superconductivity in systems with precursor pairing
• Thermodynamics and tunneling spectroscopy in the pseudogap regime of the boson fermion model
• What has NMR taught us about stripes and inhomogeneity?
• Small-angle scattering in a marginal Fermi-liquid
• BCS and BEC Finally Unified: A Brief Review
• {63}Cu NQR Study of the Inhomogeneous Electronic State in La{2-x}Sr{x}CuO{4}
• On the Crossover from BCS Superconductivity to Bose Condensation
• Comment on 'Effect of on-site Coulomb repulsion on superconductivity in the boson-fermion model' (T. Domanski, Phys. Rev. B v.66, 134512 (2002))
• Oxygen Phonon Branches in Detwinned YBa2Cu3O7