Electron momentum distribution in underdoped cuprates

Abstract

We investigate the electron momentum distribution function (EMD) in a weakly doped two-dimensional quantum antiferromagnet (AFM) as described by the t-J model. Our analytical results for a single hole in an AFM based on the self-consistent Born approximation (SCBA) indicate an anomalous momentum dependence of EMD showing 'hole pockets' coexisting with a signature of an emerging large Fermi surface. The position of the incipient Fermi surface and the structure of the EMD is determined by the momentum of the ground state. Our analysis shows that this result remains robust in the presence of next-nearest neighbor hopping terms in the model. Exact diagonalization results for small clusters are with the SCBA reproduced quantitatively.

5 pages, submitted to PRB

References in corpus (4)

• Truncation of a 2-dimensional Fermi surface due to quasiparticle gap formation at the saddle points
• Violation of Luttinger's Theorem in the Two-Dimensional t-J Model
• A comprehensive numerical and analytical study of two holes doped into the 2D t-J model
• Does the Two-Dimensional t-J Model have Hole Pockets?

Cited by in corpus (5)

• Mode-Coupling Model of Mott Gap Collapse in the Cuprates: Natural Phase Boundary for Quantum Critical Points
• Spectral functions, Fermi surface and pseudogap in the t-J model
• Stripe as an effective one-dimensional band of composite excitations
• Pseudogap and the Fermi surface in the t-J model
• Electron Momentum Distribution Function in the t-t'-J Model