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Nature 413, 788-789 (25 October 2001) | doi:10.1038/35101685

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Condensed-matter physics: Magnetic spins that last for ever

Piers Coleman

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Phase transitions occurring at a temperature of absolute zero — quantum phase transitions — are hard to measure. A new type of quantum phase transition is now predicted to occur in two dimensions, rather than three.

Matter transforms itself into new ordered states through phase transitions. At a first-order phase transition, such as boiling or melting, the new phase emerges quickly following a sharp transition.