Spin 1/2 Magnetic Impurity in a 2D Magnetic System Close to Quantum Critical Point

Details Spin 1/2 Magnetic Impurity in a 2D Magnetic System Close to Quantum Critical Point Spin 1/2 Magnetic Impurity in a 2D Magnetic System Close to Quantum Critical Point

2000-04-05

arxiv.org/abs/cond-mat/0004057v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 9 figures

Scientific paper

10.1103/PhysRevB.62.12135

We consider a magnetic impurity in a spin liquid state of a magnetic system which is close to the quantum phase transition to the magnetically ordered state. There is similarity between this problem and the Kondo problem. We derive the impurity Green's function, consider renormalizations of the magnetic moments of the impurity, calculate critical indexes for the magnetic susceptibilities and finally consider specific heat and magnetic interaction of two impurities.

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