Domain-like Incommensurate Charge-Density-Wave States and the First-Order Incommensurate-Commensurate Transitions in Layered Tantalum Dichalcogenides. : I. 1T-Polytype

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概要

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• The incommensurate (I) states of the triple charge density waves (CDW) in IT-TaS.are studied in details by taking into account a sufficierntly large number of harmonics. Adomain-like structure of the I-CDW state is shown 1.o be realized as the fundamentalwave vector of the I state approaches to the commensurate ("3 x 1" superstructure)wave vector; the domain boundary is characterized generally by a change of the phaseand amplitude. of the CDW, and inside the domain an approximately commensurateCDW is stabilized. The nature of the commensurabi].ity energy ?tnd the coexistence ofthree CDW's are reflected in the pattern of the domain-like strtucture. The successivefirst-order transitions in IT-TaS. are discussed in this connection. The presence of adomain-like structure, which our theory predicts for the nearly commensurate phase ofIT-TaS., is consistent with the recent X-ray photoemission experiment by Hughes andPollak.

• 社団法人日本物理学会の論文
• 1977-12-15

著者

• Shiba Hiroyuki

  Institute For Solid State Physics University Of Tokyo

• Nakanishi Kazuo

  Institute For Solid State Physics University Of Tokyo

• Shiba Hiroyuki

  Institute For Solic State Physics University Of Tokyo

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