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Author Panda, B. N. ♦ Sahoo, B. K. ♦ Rout, G. C.
Source IACS Kolkata
Content type Text
Publisher Indian Association for the Cultivation of Science
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Magnetic superconductor ♦ Antiferromagnetic order ♦ Cu–O planes ♦ BCS model
Abstract The interplay between superconductivity (SC) and antiferromagnetism (AFM)is studied in strongly correlated systems of high TcCuprate superconductors. It isassumed that superconductivity arises due to BCS pairing mechanism in presence ofAFMin Culattices of Cu–Oplanes. The total Hamiltonian of the system is mean fieldone and has been solved exactly by writing the equations of motion for the singleparticle Green’s functions. Equations for the appropriate single particleco-relation functions are derived and the order parameters corresponding to SC andAFM are determined. It is assumed that the Fermi energy .F = 0 and the renormalizedlocalized f energy level coincide with the Fermi level. All the quantities in thefinal equation for h and . are made dimensionless by dividing by 2t, where t is thehopping integral. The temperature dependent values of staggered magnetic field (h)and SC gap (.) were determined by solving self-consistent equations for h and .. Thequasi­particle energy bands are function of AFM gap (h), SC gap (.) andhybridization (V ). Then the dispersion of quasi-particles are studied at differenttemperatures by considering temperature dependent values of h and . and varyingother different model parameters.
Education Level UG and PG
Learning Resource Type Article
Journal Indian J Phys
Volume Number 83
Issue Number 4
Page Count 8
Starting Page 447
Ending Page 454