Spin polarons in triangular antiferromagnets
arXiv:cond-mat/9811191 · doi:10.1103/PhysRevB.59.6027
Abstract
The motion of a single hole in a 2D triangular antiferromagnet is investigated using the t-J model. The one-hole states are described by strings of spin deviations around the hole. Using projection technique the one-hole spectral function is calculated. For large J/t we find low-lying quasiparticle-like bands which are well separated from an incoherent background by a gap of order J. However, for small J/t this gap vanishes and the spectrum becomes broad over an energy range of several t. The results are compared with SCBA calculations and numerical data.
4 pages, 6 figs, to be publish in PRB
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- Spectral Function in Mott Insulating Surfaces
- Electronic route to stabilize nanoscale spin textures in itinerant frustrated magnets
- 59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2-yH2O
- Evolution of the single-hole spectral function across a quantum phase transition in the anisotropic-triangular-lattice antiferromagnet