The two-impurity Kondo Hamiltonian is known to possess a multicritical point separating stable Fermi-liquid phases in which the two impurities either form a singlet or else are screened by the conduction electrons. We propose an exact critical theory for this non-Fermi-liquid multicritical point, using conformal field theory methods, which predicts all critical properties including the finite-size spectrum, specific heat, susceptibilities, renormalization-group behavior, residual entropy, scattering matrix, and local pair Greens function. © 1992 The American Physical Society.
CITATION STYLE
Affleck, I., & Ludwig, A. W. W. (1992). Exact critical theory of the two-impurity Kondo model. Physical Review Letters, 68(7), 1046–1049. https://doi.org/10.1103/PhysRevLett.68.1046
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