A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems

Details A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems

2004-11-08

arxiv.org/abs/cond-mat/0411197v1

Europhysics Letters 71, 790 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1209/epl/i2005-10138-7

We show that two apparently contradictory theories on the existence of Griffiths-McCoy singularities in magnetic metallic systems [1,2] are in fact mathematically equivalent. We discuss the generic phase diagram of the problem and show that there is a non-universal crossover temperature range T* < T < W where power law behavior (Griffiths-McCoy behavior) is expect. For T

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