Phase Fluctuations and Single Fermion Spectral Density in 2D Systems with Attraction

Abstract

The effect of static fluctuations in the phase of the order parameter on the normal and superconducting properties of a 2D system with attractive four-fermion interaction is studied. Analytic expressions for the fermion Green's function, its spectral density, and the density of states are derived in the approximation where the coupling between the spin and charge degrees of freedom is neglected. The resulting single-particle Green's function clearly demonstrates a non-Fermi liquid behavior. The results show that as the temperature increases through the 2D critical temperature, the width of the quasiparticle peaks broadens significantly.

29 pages, ReVTeX, 12 EPS figures; references added, typos corrected, new comments added

References in corpus (17)

• Vanishing of phase coherence in underdoped Bi_2Sr_2CaCu_2O_8+d
• Phenomenology of Photoemission Lineshapes of High Tc Superconductors
• Phase Fluctuations and Spectral Properties of Underdoped Cuprates
• Pairing Fluctuation Theory of Superconducting Properties in Underdoped to Overdoped Cuprates
• Pseudogap effects induced by resonant pair scattering
• Pseudogap above Tc in a model with d_{x^2-y^2} pairing
• Nonperturbative XY-model approach to strong coupling superconductivity in two and three dimensions
• Non-interacting Cooper pairs inside a pseudogap
• On the Relationship Between the Pseudo- and Superconducting Gaps: Effects of Residual Pairing Correlations Below Tc
• Onsager Loop-Transition and First Order Flux-Line Lattice Melting in High-$T_c$ Superconductors
• Extraction of the Electron Self-Energy from Angle Resolved Photoemission Data: Application to Bi2212
• One-Electron Spectral Functions of the Attractive Hubbard Model for Intermediate Coupling
• Coupled electrons and pair fluctuations in two dimensions: a transition to superconductivity in a conserving approximation
• Incoherent Pair Tunneling as a Probe of the Cuprate Pseudogap
• Evolution of the pairing pseudogap in the spectral function with interplane anisotropy
• A Review of the Real Space Renormalization Group Analysis of the Two- Dimensional Coulomb Gas, the Kosterlitz-Thouless-Berezinski Transition, and Extensions to a Layered Vortex Gas
• Pseudogap in the one-electron spectral functions of the attractive Hubbard model

Cited by in corpus (12)

• Phase Fluctuations and Pseudogap Phenomena
• Quantum phase transitions in d-wave superconductors
• Competing orders and quantum criticality in doped antiferromagnets
• BCS-BEC Crossover in 2D Fermi Gases with Rashba Spin-Orbit Coupling
• Antiferromagnetism and single-particle properties in the two-dimensional half-filled Hubbard model: a non-linear sigma model approach
• Pairing fluctuations and pseudogaps in the attractive Hubbard model
• Finite Temperature Time-Dependent Effective Theory for the Phase Field in two-dimensional d-wave Neutral Superconductor
• Spin orthogonality catastrophe in two-dimensional antiferromagnets and superconductors
• Berezinskii-Kosterlitz-Thouless transition and BCS-Bose crossover in the two-dimensional attractive Hubbard model
• Superfluid density and Berezinskii-Kosterlitz-Thouless transition of a spin-orbit coupled Fulde-Ferrell superfluid
• Phase Fluctuations and Pseudogap Properties: Influence of Nonmagnetic Impurities
• Quantum Phase Fluctuations Responsible for Pseudogap