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Topic: Kosterlitz-Thouless transition


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In the News (Mon 4 Jun 12)

  
 Phase transition - Wikipedia, the free encyclopedia
The Ehrenfest scheme is an inaccurate method of classifying phase transitions, for it is based on the mean field theory of phases (to be described in a later section.) Mean field theory is inaccurate in the vicinity of phase transitions, as it neglects the role of thermodynamic fluctuations.
Universality is a prediction of the renormalization group theory of phase transitions, which states that the thermodynamic properties of a system near a phase transition depend only on a small number of features, such as dimensionality and symmetry, and is insensitive to the underlying microscopic properties of the system.
The distinguishing characteristic of a phase transition is an abrupt sudden change in one or more physical properties, in particular the heat capacity, with a small change in a thermodynamic variable such as the temperature.
en.wikipedia.org /wiki/Phase_transition

  
 Berezinsky-Kosterlitz-Thouless transition
Transition Metals Uses of the first row transition metals, their common ores, general properties and use as catalysts.
Bank of Finland, Institute for Economies in Transition BOFIT specialises in high-level research on transition economics and analysis of specific national economies involved in the transition from command to market economy.
Alaska Transition Initiative ATI gives information on IDEA, person centered planning, integrating transition into IEPs, and aids parents and communities in planning disabled students' school to work transition.
www.serebella.com /encyclopedia/article-Berezinsky-Kosterlitz-Thouless_transition.html

  
 hep-th:0303184
The transition is continuous, but is not of the Ising type as in nonsupersymmetric Georgi-Glashow model, but rather of the Berezinsky-Kosterlitz-Thouless type as in $Z_4$-invariant spin model.
We find that as the temperature is raised, the deconfinement and the parity restoration occur in this model at the same point $T_c=g^2/8\pi$.
www.thphys.uni-heidelberg.de /cgi-bin/abstracts/hep-th:0303184

  
 Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
An increase of phase fluctuations of the order parameter, mostly due to spontaneous vortex formation, leads to a possibility of a drastic reduction of T{sub c}, which practically coincides with T{sub BKT}, the temperature of the Berezinsky-Kosterlitz-Thouless transition.
Since no marked shrinking of the Fermi surface was found, our explanation is based on the idea of disruption of the connection between CuO{sub 2} bilayers due to reduction of localized centers providing resonant tunneling between the layers.
At the same time, the local energy gap is likely to undergo no major changes.
www.osti.gov /energycitations/product.biblio.jsp?osti_id=510616

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