Electron Spectral Function and Algebraic Spin Liquid for the Normal State of Underdoped High Tc Superconductors
Abstract
We propose to describe the spin fluctuations in the normal state (spin-pseudogap phase) of underdoped high Tc cuprates as a manifestation of an algebraic spin liquid. Within the slave boson implementation of spin-charge separation, the normal state is described by massless Dirac fermions, charged bosons, and a gauge field. The gauge interaction, as an exact marginal perturbation, drives the mean-field free-spinon fixed point to a new spin-quantum fixed point-the algebraic spin liquid. Luttinger-liquid-like line shapes for the electron spectral function are obtained in the normal state, and we show how a coherent quasiparticle peak appears as spin and charge recombine.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2001
- DOI:
- 10.1103/PhysRevLett.86.3871
- arXiv:
- arXiv:cond-mat/0010378
- Bibcode:
- 2001PhRvL..86.3871R
- Keywords:
-
- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 3 figures. published version