Theory of hole propagation in one dimensional insulators and superconductors

Details Theory of hole propagation in one dimensional insulators and superconductors Theory of hole propagation in one dimensional insulators and superconductors

1997-09-12

arxiv.org/abs/cond-mat/9709146v1

Physics

Condensed Matter

38 pages, RevTeX + 13 figures in a single Postscript file submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.57.6444

The dynamical properties of hole motion in an antiferromagnetic background are determined in one dimensional models in zero magnetic field, where spin isotropy holds, as well as in an external magnetic field. The latter case is also relevant, via particle-hole transformation, to the problem of hole propagation in one dimensional "superconductors". The singularities in the spectral function are investigated by means of bosonization techniques and perturbation theories. Results are then compared with Bethe ansatz solutions and Lanczos diagonalizations. The formalism also leads to interesting connections to the single impurity problem in Luttinger liquids. A rich structure is found in the spectral function whenever spin isotropy is broken, suggesting the presence of exotic momentum dependence in photoemission spectra of (quasi) one dimensional materials.

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