Single-valuedness problem on charge density wave rings. (5th November 2015)

• Record Type: Journal Article
• Authors: Hosokawa, T.; Matsuura, T.; Tsubota, M.; Tanda, S.
• Is Part Of: Europhysics letters. Volume 112:Number 2(2015:Oct.)
• Publication Date: 2015-11-05
• Subjects: 71.45.Lr -- 72.15.Nj -- 03.65.Vf; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/112/27005
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: We investigate the bimodal fluctuation of charge density wave (CDW) current through ring-shaped crystals (typical diameter is a few ten ) of orthorhombic tantalum trisulfide . We find that the CDW current changes between two types of the bimodal fluctuation, and exhibits hysteretic behavior as a function of the dc voltage. The hysteresis of the fluctuation modes suggests that the CDW rings involve several metastable sliding states, which might be a manifestation of single-valuedness of the CDW phase field with a strong periodic boundary condition of the ring geometry.