使用 (DFT + U) 方法对Ti2CO2MXene的结构,电子和光学特性进行计算研究
Shahab Rahimi1, Ebrahim Heidari Semiromi2, Alireza Mostafaei3
1Faculty of Physics, University of Kashan, kilometer 6, Allameh Qutb Rawandi Blvd, Kashan, Iran. shahabrahimi1360@gmail.com.
Scientific reports
|November 26, 2025
概括
这项研究揭示了Ti2CO2单层.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算化学计算化学
背景情况:
- 二维 (2D) 材料和MXenes提供独特的电子和光学特性.
- 了解Ti2CO2的特性对于新的纳米设备应用至关重要.
研究的目的:
- 系统地研究Ti2CO2单层的结构,电子和光学特性.
- 探索电子与电子相互作用对其性能的影响.
- 评估其在各种技术应用中的潜力.
主要方法:
- 密度函数理论 (DFT) 使用 PBE-GGA + U 校正.
- 采用了超软伪潜能 (USPP) 和常态保护性伪潜能 (NC).
- 计算包括哈巴德参数,带结构,状态的部分密度和光学响应.
主要成果:
- Ti2CO2显示了一个间接的带间隙,高于标准的PBE-GGA计算.
- 价值带由C-2p和O-2p轨道主导;导电带由Ti-3d轨道主导.
- 观察到强烈的光学异质性,有明显的吸收开始和等离子体最大值.
结论:
- Ti2CO2显示出有前途的电子和光学特性,包括异构性行为.
- 电子-电子相互作用显著影响光谱特征.
- 潜在的应用包括光探测器,太阳能设备,光催化和透明导电涂层.
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