Artículos de revistas
Covalent Bond Pairing In An Extended Hubbard Model With Correlated Hopping : Interplay Of Antiferromagnetism And Superconductivity
Registro en:
Solid State Communications. , v. 76, n. 9, p. 1121 - 1127, 1990.
381098
10.1016/0038-1098(90)90977-J
2-s2.0-0025591853
Autor
Lara G.A.
Cabrera G.G.
Institución
Resumen
An extended one-band Hubbard model, including Coulomb repulsion and correlated hopping between nearest neighbors, is studied for the square lattice. The onset of superconductivity in the presence of antiferromagnetism is tested, near to and away from half filling, using a mean field approach. Competition between on-site and inter-site repulsion, modulated by correlated hopping, yields a covalent bond configuration with partial intrasite and intersite pairings. In addition, antiferromagnetism induces a mixed p- and s-type pairing, and completely suppresses superconductivity when the magnetic moment gets saturation. We discuss the relevance of the present model in relation to copper oxide superconductors. © 1990. 76 9 1121 1127 Woods Halley, (1988) Theories of High Temperature Superconductivity, , For a review of the recent theoretical developments see for example, Addison Wesley, Reading, MA Anderson, (1987) Science, 235, p. 1196 Lagos, Cabrera, (1988) Phys. Rev. B, 38, p. 659 Cabrera, Medeiros, Lagos, (1988) Progress in High Temperature Superconductivity, 9, p. 295. , R. Nicolsky, R.A. Barrio, O.F. de Lima, R. Escudero, World Scientific Lagos, Kiwi, Gagliano, Cabrera, (1989) Solid State Commun., 70, p. 431 Brinkman, Rice, (1970) Phys. Rev. B, 2, p. 796 Hirsch, Lin, (1988) Phys. Rev. B, 37, p. 5070 Sorella, Tosatti, Baroni, Car, Parrinello, Towards the Theoretical Understanding of the High-Tc Superconductors (1988) Progress in High Temperature Superconductivity, 14, p. 457. , S. Lundquist, E. Tosatti, M. Tosi, Yu Lu, World Scientific, Singapore R.R. dos Santos and J.E. Hirsch, to be publishedAlexandrov, Ranninger, Robaszkiewicz, (1986) Phys. Rev. B, 33, p. 4526. , For a negative U-Hubbard model see Hubbard, Electron Correlations in Narrow Energy Bands (1963) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 276, p. 238 Hirsch, Marsiglio, (1989) Phys. Rev. B, 39, p. 11515 Hirsch, (1989) Physics Letters A, 134, p. 451 Micnas, Ranninger, Robaszkiewicz, (1989) Phys. Rev. B, 39, p. 11653 Baskaran, Zou, Anderson, (1987) Solid State Commun., 63, p. 973 Zubarev, Double-time Green functions in statistical physics (1960) Uspekhi Fizicheskih Nauk, 71, p. 71 DOUBLE-TIME GREEN FUNCTIONS IN STATISTICAL PHYSICS (1960) Soviet Physics Uspekhi, 3, p. 320. , English translation Batlogg, (1990) High Temperature Superconductivity: The Los Alamos Symposium - 1989, , K. Bedell, D. Coffey, D. Pines, J.R. Scrieffer, Addison Wesley, to appear Sinha, (1988) Progress in High Temperature Superconductivity, 9, p. 202. , R. Nicolsky, R.A. Barrio, O.F. de Lima, R. Escudero, World Scientific, Singapore, and references there in Birgeneau, (1989) Phys. Rev. B, 39, p. 2868 Birgeneau, The Richtmyer Memorial Lecture (January 1989): Novel magnetic phenomena and high-temperature superconductivity in lamellar copper oxides (1990) American Journal of Physics, 58, p. 28 Mermin, Wagner, (1966) Phys. Rev. Lett., 17, p. 1133 Hohenberg, (1967) Phys. Rev., 158, p. 383 Zhang, Rice, (1988) Phys. Rev. B, 37, p. 3759 Zhang, (1989) Phys. Rev. B, 39, p. 7375 R.R. dos Santos and J.E. Hirsch, to be publishedCzycholl, (1986) Phys. Rep., 143, p. 277