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Open Quantum Systems Decoherence

Colossal effects in transition metal oxides caused by intrinsic inhomogeneities.

PubMed
Authors: Burgy J, Mayr M, Martin-Mayor V, Moreo A, Dagotto E

Year

2001

Paper ID

13174

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

106

Citations

433

Abstract

The influence of quenched disorder on the competition between ordered states separated by a first-order transition is investigated. A phase diagram with features resembling quantum-critical behavior is observed, even using classical models. The low-temperature paramagnetic regime consists of coexisting ordered clusters, with randomly oriented order parameters. Extended to manganites, this state is argued to have a colossal magnetoresistance effect. A scale T(*) for cluster formation is discussed. This is the analog of the Griffiths temperature, but for the case of two competing orders, producing a strong susceptibility to external fields. Cuprates may have similar features, compatible with the large proximity effect of the very underdoped regime.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2001 reference point for readers tracking recent quantum research.
  • The influence of quenched disorder on the competition between ordered states separated by a first-order transition is investigated.

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.87.277202 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/11800911/

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal • updated 2026-06-13 01:15:19

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