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Charge density wave soliton liquid

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Title: Charge density wave soliton liquid
Authors: Matsuura, T. Browse this author
Hara, J. Browse this author
Inagaki, K. Browse this author
Tsubota, M. Browse this author
Hosokawa, T. Browse this author
Tanda, S. Browse this author
Issue Date: 2-Feb-2015
Publisher: IOP Publishing
Journal Title: EPL (Europhysics Letters)
Volume: 109
Issue: 2
Start Page: 27005
Publisher DOI: 10.1209/0295-5075/109/27005
Abstract: We investigate the charge density wave transport in a quasi–one-dimensional conductor, orthorhombic tantalum trisulfide (o-TaS3), by applying a radio-frequency ac voltage. We find a new ac-dc interference spectrum in the differential conductance, which appears on both sides of the zero-bias peak. The frequency and amplitude dependences of the new spectrum do not correspond to those of any usual ac-dc interference spectrum (Shapiro steps). The results suggest that CDW phase dynamics has a hidden degree of freedom. We propose a model in which phase solitons behave as liquid. The origin of the new spectrum is that the solitons are depinned from impurity potentials assisted by an ac field when a small dc field is applied. Our results provide a new insight as regards our understanding of an elementary process in CDW dynamics.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松浦 徹

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