Microscopic Study of Domain Structure in Charge Density Wave States in 2H-TaS1.8Se0.2

S. Ohta, Y. Fujisawa, S. Demura, H. Sakata

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2 Citations (Scopus)


Transition metal dichalcogenides 2H-TaS2 and 2H-TaSe2 show charge density wave (CDW) state and superconductivity. It has been reported that elemental substitution of chalcogenide suppresses the CDW and enhances superconductivity. However, how the CDW order is suppressed by the substitution has not been clarified yet. To clarify this, we performed real space observation of the CDW state in the commensurate phase of 2H-TaS1.8Se0.2 by scanning tunneling microscopy. The existence of domains separated by walls at which the phase of the CDW shifts was observed. The change in the electronic state on the domain boundaries in 2H-TaS1.8Se0.2 was not as drastic as that in 1T-FexTa1-xS2.

Original languageEnglish
Article number012004
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 15 Oct 2019
Event31st International Symposium on Superconductivity, ISS 2018 - Tsukuba, Ibaraki, Japan
Duration: 12 Dec 201814 Dec 2018


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