Strong coupling in the Kondo problem in the low-temperature region
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The magnetic field dependence of the average spin of a localized electron coupled to conduction electrons with an antiferromangetic exchange interaction is found for the ground state. In the magnetic field range μH∼0.5T c (T c is the Kondo temperature) there is an inflection point, and in the strong magnetic field range μH≫T c , the correction to the average spin is proportional to (T c /μ H)2. In zero magnetic field, the interaction with conduction electrons also leads to the splitting of doubly degenerate spin impurity states.
KeywordsSpectroscopy Magnetic Field Field Theory Elementary Particle Quantum Field Theory
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