Nowotny Chimney Ladder Phases with Group 5 Metals: Crystal and Electronic Structure and Relations to the CrSi2 Structure Type

Authors

Evgney V. Dikarev, University at Albany, State University of New York
Zheng Wei, University at Albany, State University of New York
Maxim S. Likhanov, Moscow State Lomonosov University
Nikita V. Sytov, Moscow State Lomonosov University
Andrei V. Shevelkov, Moscow State Lomonosov University

Document Type

Article

Publication Date

8-3-2020

DOI

https://doi.org/10.3390/cryst10080670

Abstract

Nowotny chimney ladder (NCL) phases are intermetallic compounds formed by transition metals and metals of groups 13 and 14. This family can be expanded by combining two p-elements from different groups with those transition metals, for which the corresponding binary NCL phases are unknown. In this paper, we present three new compounds in the V-Al-Ge, Nb-Al-Ge, and Nb-Ga-Ge systems related to the TiSi₂ structure type (Sp. Gr. Fddd) obtained with the standard ampule technique. The crystal structures of the new compounds were determined using synchrotron powder X-ray diffraction data. A transition to the CrSi₂ structure type was detected upon changing the composition from VAl_0.72(2)Ge_1.28(2) to VAl_1.534(3)Ge_0.466(3). According to the 18–n rule, all the compounds are metallic conductors, which was supported by the electronic structure calculations. It was shown that the expected energy gap located above the Fermi level in the vanadium-based NCL compound collapsed into a pseudogap upon the replacement of V by Nb.

Comments

This is the Publisher’s PDF of the following article made available by Crystals: Likhanov MS, Sytov NV, Wei Z, Dikarev EV, Shevelkov AV. Nowotny Chimney Ladder Phases with Group 5 Metals: Crystal and Electronic Structure and Relations to the CrSi₂ Structure Type. Crystals. 2020; 10(8):670. https://doi.org/10.3390/cryst10080670

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

Dikarev, Evgney V.; Wei, Zheng; Likhanov, Maxim S.; Sytov, Nikita V.; and Shevelkov, Andrei V., "Nowotny Chimney Ladder Phases with Group 5 Metals: Crystal and Electronic Structure and Relations to the CrSi2 Structure Type" (2020). Chemistry Department Faculty Scholarship. 5.
https://scholarsarchive.library.albany.edu/chemistry_fac_scholar/5