@Article{TewariKish:2008:InThSi,
               author = "Tewari, B. S. and Ajay and Kishore, Ram",
          affiliation = "Department of Physics, G.B.Pant University of Agriculture and 
                         Technology and Department of Physics, G.B.Pant University of 
                         Agriculture and Technology and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Influence of three site exchange interaction on the electronic 
                         spectra of doped bilayer high Tc cuprates",
              journal = "Physica C: Superconductivity and Its Applications",
                 year = "2008",
               volume = "468",
               number = "3",
                pages = "237--243",
                month = "Feb.",
             keywords = "Electronic spectra of bilayer cuprates, Extended t–J–J3 model, 
                         Strong electronic correlations, Three site exchange interaction 
                         (J3).",
             abstract = "The influence of the three site exchange term (J3) on electronic 
                         spectral function A(k, ù) and density of states (DOS) is analyzed 
                         in doped bilayer high Tc cuprates in the normal state. The model 
                         Hamiltonian is based on the extended tJJ3 model as derived from 
                         the Hubbard model under strong coupling limit so that it 
                         necessarily includes three site exchange term (J3). For the 
                         bilayer cuprates having two CuO2 planes in a unit cell, the 
                         coupling between the planes (t) is also included. The expressions 
                         of A(k, ù) and DOS are obtained by employing the Greens function 
                         equation of motion technique within two sublattice approach and 
                         approximations applicable for strongly correlated systems. On the 
                         basis of numerical computation, we have found that three site 
                         exchange term (J3) affects the shape of the spectral function A(k, 
                         ù) and the DOS in optimal doped region of bilayer cuprates. The J3 
                         term suppresses the bilayer splitting in the electronic spectra 
                         while enhances the DOS at Fermi level. The results are viewed in 
                         terms of recent ARPES measurement in bilayer cuprate in normal 
                         state.",
                  doi = "10.1016/j.physc.2007.12.002",
                  url = "http://dx.doi.org/10.1016/j.physc.2007.12.002",
                 issn = "0921-4534",
             language = "en",
           targetfile = "influence.pdf",
        urlaccessdate = "02 maio 2024"
}