The auxetic effect and topological phase transition are interesting mechanical and electronic properties of some materials, respectively. Although each has been extensively studied separately, no material has been identified to possess both properties simultaneously. Here, we report that a two-dimensional phosphorous nitride monolayer simultaneously possesses auxetic behavior and undergoes a topological phase transition under tensile strain. The monolayer has a normal-auxeticity mechanical phase transition when a tensile strain above 0.055 is applied along the P–P zigzag direction. The negative Poisson ratio can even approach as abnormally high as −0.60. Furthermore, the material is an intrinsic Dirac material, but a phase transition from the semi-Dirac material to Dirac material is observed at nearly the same critical tensile strain as that in auxetic phase transition. An electronic orbital analysis reveals that the simultaneity of the normal-auxeticity phase transition and topological phase transition originates from the variation of orbital hybridization around the Fermi level.
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8 August 2022
Research Article|
August 08 2022
Concurrence of auxetic effect and topological phase transition in a 2D phosphorous nitride
Jiangxin Liu;
Jiangxin Liu
(Writing – original draft)
1
School of Physics and Electronic Engineering, Jiangsu University
, Zhenjiang 212013, Jiangsu, China
2
School of Physics and Optoelectronics, Xiangtan University
, Xiangtan, Hunan 411105, China
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Chao Wu
;
Chao Wu
(Writing – original draft)
1
School of Physics and Electronic Engineering, Jiangsu University
, Zhenjiang 212013, Jiangsu, China
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Yuee Xie;
Yuee Xie
a)
(Formal analysis, Writing – original draft)
1
School of Physics and Electronic Engineering, Jiangsu University
, Zhenjiang 212013, Jiangsu, China
2
School of Physics and Optoelectronics, Xiangtan University
, Xiangtan, Hunan 411105, China
a)Authors to whom correspondence should be addressed: yueex@ujs.edu.cn; chenyp@xtu.edu.cn; and pengqing@imech.ac.cn
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Xiaohong Yan;
Xiaohong Yan
(Conceptualization, Writing – review & editing)
1
School of Physics and Electronic Engineering, Jiangsu University
, Zhenjiang 212013, Jiangsu, China
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Qing Peng;
Qing Peng
a)
(Conceptualization, Formal analysis)
3
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences
, Beijing 100190, China
a)Authors to whom correspondence should be addressed: yueex@ujs.edu.cn; chenyp@xtu.edu.cn; and pengqing@imech.ac.cn
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Yuanping Chen
Yuanping Chen
a)
(Funding acquisition, Project administration, Supervision, Writing – review & editing)
1
School of Physics and Electronic Engineering, Jiangsu University
, Zhenjiang 212013, Jiangsu, China
a)Authors to whom correspondence should be addressed: yueex@ujs.edu.cn; chenyp@xtu.edu.cn; and pengqing@imech.ac.cn
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a)Authors to whom correspondence should be addressed: yueex@ujs.edu.cn; chenyp@xtu.edu.cn; and pengqing@imech.ac.cn
Appl. Phys. Lett. 121, 063101 (2022)
Article history
Received:
April 16 2022
Accepted:
July 18 2022
Citation
Jiangxin Liu, Chao Wu, Yuee Xie, Xiaohong Yan, Qing Peng, Yuanping Chen; Concurrence of auxetic effect and topological phase transition in a 2D phosphorous nitride. Appl. Phys. Lett. 8 August 2022; 121 (6): 063101. https://doi.org/10.1063/5.0096247
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