Investigation of fermionic pairing on two- dimensional tight binding lattice under phonon and electronic mechanisms within a simple Fermi liquid like scenario and beyond- possible consequences for superconductivity in overdoped cuprates

2015/06/28 by Soumi Roy Chowdhury, Chowdhury, Soumi Roy, Ranjan Chaudhury +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.1506.08373

openalex publication_date 2015/06/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Cooper's one pair problem is investigated for a 2D lattice in the background of both passive and active Fermi sea in a weakly correlated environment. Boson exchange mechanisms involving excitons as well as phonons are invoked for pairing in the s- wave channel. The important quantities calculated are pairing energy and coherence length as functions of bosonic energy, attracted coupling constant and band filling factor. Comparison of our theoretical results with those from experiments on overdoped cuprate superconductors and other type of theoretical calculations show electronic mechanism to be the more likely mechanism of pairing in the overdoped phase.

Related

• Theoretical investigation of the feasibility of electronic mechanism for superconducting pairing in overdoped cuprates with Fermi liquid like and Marginal Fermi liquid- like descriptions for the normal phase
• Investigation of fermionic pairing on tight binding lattice for low dimensional systems
• Cooperative Electronic and Phononic Mechanism of the High Temperature Superconductivity in Cuprates
• Can Excitonic Mechanism Contribute Significantly to Superconducting Pairing in Quasi 1-D Systems?
• Cooper problem in a cuprate lattice