Premium
Direct Observation of the Discommensuration in the Nearly Commensurate Charge‐Density Wave Phase in 1T‐TaS 2 by Scanning Tunneling Microscopy
Author(s) -
Ohta H.,
Takase T.,
Komiya Y.,
Miyamoto H.,
Mishima S.,
Okada T.,
Nomura K.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221690204
Subject(s) - scanning tunneling microscope , charge density wave , condensed matter physics , superlattice , quantum tunnelling , lattice (music) , materials science , hexagonal lattice , hexagonal crystal system , charge (physics) , microscopy , phase (matter) , physics , chemistry , crystallography , optics , superconductivity , quantum mechanics , antiferromagnetism , acoustics
The charge‐density wave (CDW) structure of the nearly commensurate phase of 1T‐TaS 2 is studied with scanning tunneling microscopy (STM). The hexagonal domain structure is observed in the CDW superlattice at room temperature. It is assigned to the discommensuration (DC) network. The domain size is about 8 nm and the width of domain walls is of the order of 3 nm. The observed structure agrees well with the DC model proposed by Nakanishi and Shiba. The DC structure is easily destroyed by disorder of the CDW lattice in the neighboring region.