Griffiths phase in diluted magnetic semiconductors.

We study the effects of disorder in the vicinity of the ferromagnetic transition in a diluted magnetic semiconductor in the strongly localized regime. We derive an effective polaron Hamiltonian, which leads to the Griffiths phase above the ferromagnetic transition point. The Griffiths-McCoy effects yield nonperturbative contributions to the dynamic susceptibility. We explicitly derive the long-time susceptibility, which has a pseudoscaling form, with the dynamic critical exponent being expressed through the percolation indices.

• Publication year

  2003

• Venue

  Physical Review Letters

• Publication date

  2003-06-19

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.92.177203arXiv cond-mat/0306488PMID 15169188
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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