Jump to main content
Jump to site search


The split-off terahertz radiating dipoles on thermally reduced α-V2O5 (001) surface

Author affiliations

Abstract

The trapped electron states on a pliable lattice have different localization and physical chemistry characteristics. Here, terahertz time-domain measurements suggest that the formation of vanadyl oxygen defect, in the presence of the surface potential traps and mobile charge carriers, leads to a transient charge distribution that forms terahertz radiating dipoles in V2O5. The emergence of radiating dipoles is evidenced by terahertz responses with a two-valley feature of the thermally reduced α-V2O5 (001) thin films in the temperature range of 300–700 K. The two photoconductance valleys on a several millielectron volts interval are related to two emergent split-off traps, which originate from the VO6 octahedra distortion upon the vanadyl oxygen desorption on the surface. The pliable surface lattices plays a decisive role. So long as the α-V2O5 (001) thin films are covered by a 30 nm-thick Al2O3 capping layer, the distinct two-valley feature disappears completely in the full temperature range. The terahertz radiating dipoles with a fine energy structure is potentially a new measure for charge dynamics on the α-V2O5 (001) surface.

Graphical abstract: The split-off terahertz radiating dipoles on thermally reduced α-V2O5 (001) surface

Back to tab navigation

Article information


Submitted
20 May 2020
Accepted
29 Sep 2020
First published
02 Oct 2020

Nanoscale, 2020, Advance Article
Article type
Paper

The split-off terahertz radiating dipoles on thermally reduced α-V2O5 (001) surface

Q. J. Wang, H. Wang, Z. H. Zhou, J. Zuo and C. L. Zhang, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR03889J

Social activity

Search articles by author

Spotlight

Advertisements