Static hole in a critical antiferromagnet: field-theoretic renormalization group

Abstract

We consider the quantum field theory of a single, immobile, spin S hole coupled to a two-dimensional antiferromagnet at a bulk quantum critical point between phases with and without magnetic long-range order. We present an alternative derivation of its two-loop beta function; the results agree completely with earlier work (M. Vojta et al, cond-mat/9912020), and also determine a new anomalous dimension of the hole creation operator.

6 pages, 2 figures; for field theory afficionados; all others see cond-mat/0011232; Proceedings of the 13th International Symposium on Superconductivity, October 2000, Tokyo

References in corpus (3)

• Quantum Impurity in a Nearly Critical Two Dimensional Antiferromagnet
• Quantum impurity dynamics in two-dimensional antiferromagnets and superconductors
• Spin orthogonality catastrophe in two-dimensional antiferromagnets and superconductors

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