A Toy Model of Interlayer Pair Hopping

Abstract

We extend the correlated electron model of Baskaran [Mod. Phys. Lett. {\bf B5}, 643(1991)] to the case of coupled layers. We show that the nature of the non-Fermi liquid ground state leads to the absence of electron-like quasiparticles at the Fermi surface, thereby suppressing coherent transport of electrons between the coupled layers (``confinement''). On the other hand, motion of singlet pairs between the layers is not blocked. We also discuss how pair tunneling can be used to construct a superconducting ground state.

Revtex (ver. 2), 10 pages (email: [email protected]) - IMSc/94/13

Cited by in corpus (5)

• Exact Superconducting Instability in a Doped Mott Insulator
• Simple Exactly Solvable Models of non-Fermi Liquids
• Absence of a Charge Diffusion Pole at Finite Energies in an Exactly Solvable Interacting Flat Band Model in d-dimensions
• Nonlocal Kondo effect and two-fluid picture revealed in an exactly solvable model
• Metal-Insulator Transition in the Two-Dimensional Hubbard Model at Half-Filling with Lifetime Effects within the Moment Approach