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Mo S, Seo J, Son SK, Kim S, Rhim JW, Lee H. Engineering Two-Dimensional Nodal Semimetals in Functionalized Biphenylene by Fluorine Adatoms. Nano Lett 2024; 24. [PMID: 38607382 PMCID: PMC11057037 DOI: 10.1021/acs.nanolett.4c00314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/13/2024]
Abstract
We propose a band engineering scheme on the biphenylene network, a newly synthesized carbon allotrope. We illustrate that the electronic structure of the biphenylene network can be significantly altered by controlling conditions affecting the symmetry and destructive interference of wave functions through periodic fluorination. First, we investigate the mechanism for the appearance of a type-II Dirac fermion in a pristine biphenylene network. We show that the essential ingredients are mirror symmetries and stabilization of the compact localized eigenstates via destructive interference. While the former is used for the band-crossing point along high symmetry lines, the latter induces highly inclined Dirac dispersions. Subsequently, we demonstrate the transformation of the biphenylene network's type-II Dirac semimetal phase into various Dirac phases such as type-I Dirac, gapped type-II Dirac, and nodal line semimetals through the deliberate disruption of mirror symmetry or modulation of destructive interference by varying the concentration of fluorine atoms.
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Affiliation(s)
- Seongjun Mo
- Department
of Physics, Konkuk University, Seoul 05029, Korea
| | - Jaeuk Seo
- Department
of Physics, Ajou University, Suwon 16499, Korea
- Department
of Physics, Korea Advanced Institute of
Science and Technology, Daejeon 34141, Korea
| | - Seok-Kyun Son
- Department
of Physics, Kyung Hee University, Seoul 02447, Republic of Korea
- Department
of Information Display, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Sejoong Kim
- University
of Science and Technology (UST), Gajeong-ro 217, Daejeon 34113, Korea
- Korea
Institute for Advanced Study, Hoegiro 85, Seoul 02455, Korea
| | - Jun-Won Rhim
- Research
Center for Novel Epitaxial Quantum Architectures, Department of Physics, Seoul National University, Seoul 08826, Korea
- Department
of Physics, Ajou University, Suwon 16499, Korea
| | - Hoonkyung Lee
- Department
of Physics, Konkuk University, Seoul 05029, Korea
- Research
Center for Novel Epitaxial Quantum Architectures, Department of Physics, Seoul National University, Seoul 08826, Korea
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Liu GH, Qiao SX, Wang QH, Wang H, Liu HD, Yin XZ, Tan JH, Jiao N, Lu HY, Zhang P. First-principles prediction of superconducting properties of monolayer 1T'-WS 2 under biaxial tensile strain. Phys Chem Chem Phys 2024; 26:1929-1935. [PMID: 38115787 DOI: 10.1039/d3cp05370a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
High-purity 1T'-WS2 film has been experimentally synthesized [Nature Materials, 20, 1113-1120 (2021)] and theoretically predicted to be a two-dimensional (2D) superconducting material with Dirac cones [arXiv:2301.11425]. In the present work, we further study the superconducting properties of monolayer 1T'-WS2 by applying biaxial tensile strain. It is shown that the superconducting critical temperature Tc firstly increases and then decreases with respect to tensile strains, with the highest superconducting critical temperature Tc of 7.25 K under the biaxial tensile strain of 3%. In particular, we find that Dirac cones also exist in several tensile strained cases. Our studies show that monolayer 1T'-WS2 may provide a good platform for understanding the superconductivity of 2D Dirac materials.
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Affiliation(s)
- Guo-Hua Liu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Shu-Xiang Qiao
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Qiu-Hao Wang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Hao Wang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Hao-Dong Liu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Xin-Zhu Yin
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Jin-Han Tan
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Na Jiao
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Hong-Yan Lu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Ping Zhang
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
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