Electron microscopy study of the charge-density-wave transition in 2H-TaSe2

Yasumasa Koyama, T. Onozuka

Research output: Contribution to journalArticle

Abstract

The triply incommensurate phase in 2H-TaSe2, which exists between 112 and about 85 K on cooling, has been investigated by electron microscopy. The high resolution micrographs clearly that the incommensurate phase between 112 and 92 K is an intrinsic incommensurate phase without orthorhombic domains of the commensurate phase. On the other hand, the phase between 92 and about 85 K is a kind of transition state to the commensurate phase. When the temperature is lowered, the orthorhombic domains nucleate along the discommensurations around 92 K and the lock-in transition proceeds from the formation of the stripples consisting of one kind of the orthorhombic domains and their shrinking motion. These experimental results can be explained on the basis of the Ginzburg-Landau theory.

Original languageEnglish
Pages (from-to)636-640
Number of pages5
Journalmaterials transactions, jim
Volume31
Issue number7
Publication statusPublished - 1990 Jul
Externally publishedYes

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Charge density waves
Electron microscopy
electron microscopy
Cooling
Temperature
cooling
high resolution
temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Electron microscopy study of the charge-density-wave transition in 2H-TaSe2 . / Koyama, Yasumasa; Onozuka, T.

In: materials transactions, jim, Vol. 31, No. 7, 07.1990, p. 636-640.

Research output: Contribution to journalArticle

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