Zero-temperature real-space renormalization-group method for a Kondo-lattice model Hamiltonian

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Abstract
Details are given of work on a one-dimensional analog of the Kondo-lattice problem, in which a conduction band interacts with a spin in each cell of a lattice. Results of a renormalization-group calculation (generalized from Wilson's approach to the single-site Kondo problem) published earlier in letter form, showed that the system undergoes a second-order crossover transition from an antiferromagnetic state to a Kondo-like state at zero temperature as the spin—conduction-electron coupling is increased past a critical value. The numerical approximations involved are checked against the case of the Ising chain in a transverse field for which exact solutions are available.