k‐q Functions and the Landau Theory of Second‐Order Phase Transitions

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Abstract

The use of k‐q functions is introduced into the Landau theory of second order phase transitions. The expansion of an arbitrary density function in a crystal is given in terms of basis functions of irreducible representations of a space group which are linear combinations of k‐q functions. This leads to a new condition on the irreducible representations which can be associated with second order phase transitions.

Original languageEnglish (US)
Pages (from-to)343-349
Number of pages7
Journalphysica status solidi (b)
Volume76
Issue number1
DOIs
StatePublished - Jul 1 1976

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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