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Li Y, Xia J, Khenata R, Kuang M. First-principle investigation of all types of topological nodal lines in a realistic P6 3/mmc type titanium selenide. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:285505. [PMID: 33412521 DOI: 10.1088/1361-648x/abd999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/07/2021] [Indexed: 06/12/2023]
Abstract
Topological nodal line (TNL) materials with one-dimensional band-crossing points (BCPs) exhibit interesting electronic characteristics and have special applications in electronic devices. Normally, based on the slopes of the crossing bands, the BCPs can be divided into two types, i.e., type I and type II nodal points. Based on the combination of the different types of nodal points, the nodal lines (NLs) can be divided into three categories: (i) type I NL, type II NL, and hybrid NL, these being formed by type I nodal points, type II nodal points, and type I and II nodal points, respectively. Compared with the large number of predicted type I NL materials, there are less type II and hybrid NL materials. In this study, it is predicted that P63/mmc type TiSe metal is a topological material which exhibits all types of NL states. Furthermore, the dynamic stability as well as the effect of spin-orbit coupling on the topological signatures are examined. Also, the nontrivial surface states are shown to provide evidence for the occurrence of the NL states. This novel material can be seen as a good platform to use for further investigations on the three types of NLs and diverse fermions.
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Affiliation(s)
- Yang Li
- Department of Physics, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China
| | - Jihong Xia
- Department of Physics, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China
| | - Rabah Khenata
- Laboratoire de Physique Quantique de la Matiere et de Modelisation Mathematique (LPQ3M), Universite de Mascara, Mascara 29000, Algeria
| | - Minquan Kuang
- School of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China
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Khaledialidusti R, Khazaei M, Wang V, Miao N, Si C, Wang J, Wang J. Exploring structural, electronic, and mechanical properties of 2D hexagonal MBenes. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:155503. [PMID: 33682685 DOI: 10.1088/1361-648x/abbb0e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/23/2020] [Indexed: 06/12/2023]
Abstract
A family of two-dimensional (2D) transition metal borides, referred to as MBenes, is recently emerging as novel materials with great potentials in electronic and energy harvesting applications to the field of materials science and technology. Transition metal borides can be synthesized from chemical exfoliation of ternary-layered transition metal borides, known as MAB phases. Previously it has been predicted that thin pristine 2D Sc-, Ti-, Zr-, Hf-, V-, Nb-, Ta-, Mo-, and W-based transition metal borides with hexagonal phase are more stable than their corresponding orthorhombic phase. Here, using a set of first-principles calculations (at absolute zero temperature), we have examined the geometric, dynamic stability, electronic structures, work function, bond strength, and mechanical properties of the hexagonal monolayer of transition metal borides (M= Sc, Ti, Zr, Hf, V, Nb, Ta, Mo, and W) chemically terminated with F, O, and OH. The results of the formation energies of terminated structures imply that the surface terminations could make a strong bond to the surface transition metals and provide the possibility of the development of transition metal borides with those surface terminations. Except for ScBO, which is an indirect bandgap semiconductor, the other transition metal borides are metallic or semimetal. Particularly, TiBF, ZrBF, and HfBF are metallic systems whose band dispersions close to the Fermi level indicate the coexistence of type-I and type-II nodal lines. Our calculated work functions indicate that 2D transition metal borides with OH (O) functionalization obtain the lowest (highest) work functions. The results of the mechanical properties of the considered structures imply that oxygen functionalized transition metal borides exhibit the stiffest mechanical strength with 248 <E(N m-1) < 348 while non-terminated transition metal borides are generally the weakest systems with 206 <E(N m-1) < 283.
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Affiliation(s)
- Rasoul Khaledialidusti
- Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Mohammad Khazaei
- Department of Physics, Yokohama National University, Yokohama 240-8501, Japan
| | - Vei Wang
- Department of Applied Physics, Xi'an University of Technology, Xi'an 710054, People's Republic of China
| | - Nanxi Miao
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
- International Center for Materials Discovery, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shanxi 710072, People's Republic of China
| | - Chen Si
- School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - Jianfeng Wang
- Beijing Computational Science Research Center, Beijing 100193, People's Republic of China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
- International Center for Materials Discovery, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shanxi 710072, People's Republic of China
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Li Y, Xia J, Srivastava V. The Tetragonal Monoxide of Platinum: A New Platform for Investigating Nodal-Line and Nodal-Point Semimetallic Behavior. Front Chem 2020; 8:704. [PMID: 32923427 PMCID: PMC7457133 DOI: 10.3389/fchem.2020.00704] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/08/2020] [Indexed: 11/15/2022] Open
Abstract
The search for new topological materials that are realistic to synthesize has attracted increasing attention. In this study, we systematically investigated the electronic, mechanical, and topological semimetallic properties, as well as the interesting surface states, of the tetragonal monoxide of platinum, which is realistic to synthesize, via a first-principles approach. Our calculated results indicate that PtO is a novel topological semimetal with double nodal lines in the k z = 0 plane and a pair of triple topological nodal points along the A'-M-A directions. Obvious surface states, including Fermi arc and drum-head-like surfaces, could be found around nodal points and nodal lines. The dynamic and mechanical stabilities of P4 2 /mmc-type PtO were examined in detail via calculation of the phonon dispersion and determination of elastic constants, respectively. Some other mechanical properties, including the bulk modulus, Young's modulus, shear modulus, Poisson's ratio, and Pugh's index, were considered in this study. P4 2 /mmc-type PtO provides a good research platform for investigation of novel behaviors that combine mechanical properties and rich topological elements.
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Affiliation(s)
- Yang Li
- Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, China
- Department of Physics, Chongqing University of Arts and Sciences, Chongqing, China
| | - Jihong Xia
- Department of Physics, Chongqing University of Arts and Sciences, Chongqing, China
| | - Vipul Srivastava
- Department of Physics, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, India
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