Nodal loop and nodal surface states in the Ti3Al family of materials

Topological metals and semimetals are new states of matter which are attracting great interest in current research. Here, based on first-principles calculations and symmetry analysis, we propose that the family of titanium-based compounds Ti3X (X=Al, Ga, Sn, Pb) are unexplored topological metals. Th...

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Bibliographic Details
Published in:Physical review. B 2018-06, Vol.97 (23)
Main Authors: Zhang, Xiaoming, Yu, Zhi-Ming, Zhu, Ziming, Wu, Weikang, Wang, Shan-Shan, Sheng, Xian-Lei, Yang, Shengyuan A
Format: Article
Language:English
Subjects:
Aluminum
Fermions
First principles
Gallium
Intermetallic compounds
Lead
Metalloids
Spin-orbit interactions
Symmetry
Tin
Titanium aluminides
Titanium compounds
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Summary:Topological metals and semimetals are new states of matter which are attracting great interest in current research. Here, based on first-principles calculations and symmetry analysis, we propose that the family of titanium-based compounds Ti3X (X=Al, Ga, Sn, Pb) are unexplored topological metals. These materials feature the coexistence of a nodal loop and a nodal surface in their low-energy band structures. Taking Ti3Al as an example, we show that the material has an almost ideal nodal loop in the sense that the loop is close to the Fermi level and it is nearly flat in energy with energy variation
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.235150