We analyze the dynamic scattering amplitude between quasiparticles at the Fermi surface in the proximity of a charge instability, which may occur in the high temperature superconductors. Within the infinite-U Hubbard-Holstein model we find that in the absence of long-range Coulomb forces the scattering amplitude is strongly singular at zero momentum transfer close to the phase separation instability. In the presence of long-range Coulomb forces the singularity occurs at finite wave vectors. In both cases we show how normal state properties are largely affected by this scattering. © 1995 The American Physical Society.
Singular quasiparticle scattering in the proximity of charge instabilities / Castellani, Claudio; DI CASTRO, Carlo; Grilli, Marco. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 75:25(1995), pp. 4650-4653. [10.1103/physrevlett.75.4650]
Singular quasiparticle scattering in the proximity of charge instabilities
CASTELLANI, Claudio;DI CASTRO, Carlo;GRILLI, Marco
1995
Abstract
We analyze the dynamic scattering amplitude between quasiparticles at the Fermi surface in the proximity of a charge instability, which may occur in the high temperature superconductors. Within the infinite-U Hubbard-Holstein model we find that in the absence of long-range Coulomb forces the scattering amplitude is strongly singular at zero momentum transfer close to the phase separation instability. In the presence of long-range Coulomb forces the singularity occurs at finite wave vectors. In both cases we show how normal state properties are largely affected by this scattering. © 1995 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.