ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
0/0

Reversible Iodine Intercalation into Tungsten Ditelluride

preprint
submitted on 13.02.2020 and posted on 14.02.2020 by Patrick Schmidt, Philipp Schneiderhan, Markus Ströbele, Carl P. Romao, H.-Jürgen Meyer
The new compound WTe2I was prepared by a reaction of WTe2 with iodine in a fused silica vessel at temperatures between 40 and 200 °C. Iodine atoms are intercalated into the van der Waals gap between tungsten ditelluride layers. As a result, the WTe2 layer separation and therefore the c-axis length is significantly increased, and the orthorhombic space group is preserved. Iodine atoms form planar layers between each tungsten ditelluride layer. Due to oxidation by iodine the semi-metallic nature of WTe2 is changed, as shown by comparative band structure calculations for WTe2 and WTe2I based on density functional theory. The calculated phonon band structure of WTe2I suggests a charge density wave instability at low temperature.

Funding

DFG ME 914/31-1

DFG INST 40/467-1

History

Email Address of Submitting Author

p.schmidt@uni-tuebingen.de

Institution

University of Tuebingen

Country

Germany

ORCID For Submitting Author

0000-0001-6556-2088

Declaration of Conflict of Interest

No Conflict of Interest

Exports