Ginzburg-Landau theory of an incommensurate-to-commensurate transition in barium sodium niobate

S. Mori, Y. Koyama, Y. Uesu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Features of an incommensurate-to-commensurate transition in barium sodium niobate, which is obtained in a cooling process from a tetragonal phase, have been theoretically examined on the basis of the Ginzburg-Landau theory. The present theory which takes into account the contribution of higher-order distortion waves produced from higher-order harmonics via the umklapp process, well reproduces an experimentally obtained change in an incommensurability δ on cooling. The theory also predicts both a discommensuration with a phase slip of 2π/4 and the incommensurate-to-commensurate transition.

Original languageEnglish
Pages (from-to)621-624
Number of pages4
JournalPhysical Review B
Volume49
Issue number1
DOIs
Publication statusPublished - 1994 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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