1995/05/29 by K. Hallberg, K. A. Hallberg, E. Müller‐Hartmann +2 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Theoretical and Computational Physics #cond-mat
paper · pdf · doi:10.1103/physrevb.52.4396
published as Phys. Rev. B 52, 4396 (1995) · Accepted in Phys. Rev. B. 18 pages of text (1 fig. included) in Latex + 2 figures in uuencoded form containing the 2 postscripts (mailed separately)
arxiv created 1995/05/29 · openalex publication_date 1995/08/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate the dynamical behavior of a hole in various spin backgrounds in infinite dimensions, where it can be determined exactly. We consider hypercubic lattices with two different types of spin backgrounds. On one hand we study an ensemble of spin configurations with an arbitrary spin probability on each sublattice. This model corresponds to a thermal average over all spin configurations in the presence of staggered or uniform magnetic fields. On the other hand we consider a definite spin state characterized by the angle between the spins on different sublattices, i.e., a classical spin system in an external magnetic field. When spin fluctuations are considered, this model describes the physics of unpaired particles in strong-coupling superconductors.